Should I upgrade to a MBP? and what about these crashes?

Question

Right, so I bought a macbook about a week ago, and I'm just not sure if I should upgrade to a MB Pro or not?
I'm not a huge gamer, the only game I can think of playing on XP is Flight Simulator X, which does need a good video card, but I haven't played any games for 6 months or so, so I don't think that justifies getting a MBP.
Other than that, how is XP performance on the Core 2 Duo macbook? Does the integrated graphics cause problems? I suppose it is just like any XP laptop you can buy nowadays, as most of them also come with integrated graphics.
The only thing that does make me feel like getting a MBP, however, is that this thing is a bit too happy to ramp up the fans sometimes. I'm thinking this is because of the integrated graphics? Am I wrong about this? I noticed that the fan came on easily in the following scenarios:
1. Playing Macbreak Weekly H.264 video podcast fullscreen within iTunes 7. If not fullscreen, the fan doesn't come on. BTW, I noticed VLC plays this a lot smoother than iTunes. I don't know if VLC makes the fans come on though.
2. Running iEatBrainz (a rosetta version). the fan came on while it was scanning my music collection, maybe this isn't related to integrated graphics?
3. Playing an HD trailer, the fans come on. If this is due to integrated graphics then isn't this a future problem when there will be more HD around to play? the fan coming on all the time will be very annoying. I'm not really going to be playing heavy HD anytime soon though, but in the future it might be an issue.
Two other separate problems I hope you guys can help me with:
Problem 1:
It has crashed 3 times in the past week.
Crash 1: I think this was due to VirtueDesktops and trying to use an external display at the same time. Basically the WindowServer crashed and I lost the Apple menu and right-side clock and stuff. The dock was there and I could click on icons but nothing would launch. I had to force a shutdown by holding down the power button.
Crash 2: Once again I think this is due to the external display. I was connected to the external display when I put the computer to sleep and it hung, the display was still on the external monitor but I couldn't click on any menus or dock so I had to force shutdown.
Crash 3: Just 2 days ago I disconnected from the external display and was using it on the couch when I closed the lid because I had something to do and as i walked away I heard the startup apple sound! It had restarted just because I closed the lid! That was really odd.
Before I close this problem off, though I must add that I initially used this laptop w/o an external display and keyboard+mouse for 3 days straight without any problems. I also did a hardware test (extended) and everything is fine. So I think 10.4.8 and external display + USB might be broken?
Just in case, I have reinstalled the whole OS a day ago and so far with multiple sleep cycles and doing normal work (not connected to external stuff) it is just fine so I don't think there is a hardware issue.
Problem 2:
The other problem with the Macbook is that the button on the trackpad is just slightly sort of off-balance? I can make it move forward/backward vertically if I trace my finger vertically across it, is this normal? Sometimes if I click on the left hand side, it sort of gets stuck but immediately comes back up, so it's not a huge problem but annoying nonetheless. Does this warrant me getting a replacement unit? Could the button just stop working in the future, and then they have to replace the whole top casing don't they? Note that this happens only sometimes, and is hard to reproduce if I try to do it manually, it just happens *once in a while* but the button does work properly and everything and the right side of the trackpad is just fine.
Other than this the laptop is fine, and I simply don't have the budget to pay for a MBP right now but I've been waiting to get a mac for so long now that I just don't want to return this and wait a few more months ...
White 2.0 Ghz Macbook Core 2 Duo   Mac OS X (10.4.8)  

Answer 1

you are right, the macbook has endured multiple sleep/wake cycles now, and i finally plugged in a USB mouse yesterday and it still seems fine. The touchpad button is still a little loose however.
As for the extended test, I did that and there are no problems, so what do I do now?
I have decided against upgrading for now, and I don't want to go to the hassle of taking it all the way down to the apple store, but even more stories today of macbook cases slightly warped after time and cracks appearing also scare me, how common is this? Or is it just careless users who might have dropped the macbook?
If this case bending or warping or cracking and ramping up fans is common, I might as well save all my money and return it. I don't want to argue with Apple later on about fixing things, I've read horror stories there as well ...
and yes, I'm in a forum where people only post problems but there seems to be too many, or am I wrong?
White 2.0 Ghz Macbook Core 2 Duo Mac OS X (10.4.8)