Specific questions about a RAM upgrade to 4GB on my MBP

I have a MBP model MA895LL/A. Currently populated with the original memory (2GB)
Recent clean install of Snow Leopard, with all current updates.
Specific questions:
What memory does Apple use in their laptops? Does it really matter if you get the same manufacturer for complete compatibility?
Do timings matter? Will faster timing improve performance slightly, or is it a waste of money to go for the faster stuff on my specific model (Intel Core 2 Duo T7500)
Best to populate with 2 sticks X 2?
Finally, how about manufacturers? Anyone have any positive experiences with specific manufacturers, or, horror stories they can share?
I guess I just want to buy the best memory for my MBP. I build my own PCs, but I'm not sure if the Mac is a little more picky, RAM wise. Cost isn't really a factor. I'm willing to spend a little more, and buy the right stuff, and only do it once, without the hassle of sending it back, etc.
Any advice would be great. I know its possible this question has been answered many times before. I guess I don't know where to look...

Uh, yes, this is asked just about every day, like here:
http://discussions.apple.com/thread.jspa?threadID=2154109&tstart=0
Using the "Search Category" box in the upper right works.
To answer your questions, since you likely have the 2 slots filled with 1GB DIMMs, you need to get a pair of 2GB to max the RAM. I guess you could use 1 OEM stick and one 2GB stick for 3GB total, but I would just go for 4GB. If you are under warranty, save the original RAM, as Apple seems to dislike seeing any 3rd party RAM no matter what. Put the OEM RAM back in if you need warranty work.
I've seen several brands OEM, a lot of Hynix and Samsung, but it is probably all well tested to Apple spec. Otherwise, brands mean nothing, but see the above linked thread. I prefer to go with the exact spec'd RAM myself. I believe "faster" RAM does not run any faster. Vendors mentioned in the linked thread all have selector aids to find the exact RAM for your model.

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Quote
2. Is 200 BCLK way too high? I haven't seen too many people overclocking using my settings...
"Too high" or not too high is a somewhat pointless question when it comes to overclocking. From a specfication perspective, everything above default clock speeds is too high and so is a memory clock speed of DDR3-1600 (as Intel's specifications define DDR3-1333 as the maximum supported memory speed).
Quote
I have an important question about the BCLK I should be setting so that my RAM would run at its default speed of 1600 (G. Skill Ripjaws 4 GB).
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