Brand New iMac 24" internal or external hard drive upgrade to 1TB?

Question

I just purchased a brand new iMac 24" MB325LL with a 320GB hard drive. I currently have 432GB of data on my PC and I would like to upgrade the hard drive to 1TB. I have 2 options and I need your advice:
Option #1 » Cost:CDN*$255*
Buy a Samsung Spinpoint F1 1TB from DirectCanada.com for CDN$155 (tax+shipping included). Get it installed by a certified Apple technician for CDN$100 in Toronto. I doubt I can get it installed for a lower fee.
Option #2 » Cost:CDN*$317*
Buy a LaCie D2 1TB external hard drive with Firewire 800 for CDN$317 (tax+shipping included) either from a U.S. retailer (e.g. iUnitek) or a Canadian one. Prices at Canadian online retailers start from CDN$266 + CDN$37 (13% tax) + CDN$18 (shipping) = CDN$321, which is just CDN$4 more than in the States, taking into account the exchange rate.
So, there you. From the financial point of view, the incentive is to get an internal hard drive, which I don't mind at all. I'd like to install Vista on a 30-40GB partition, if that makes a difference. If I were to get an external hard drive, I would keep all of my data (e.g. music, movies, documents, music, etc) on it and reserve the internal 320GB hard drive for system files and OS.
What would justify paying a premium for an external hard drive other than portability? If I were to get one, I would need to be able to access it not only from my iMac's Vista partition, but also from my HP Vista laptop. Same applies to the internal hard drive. If I were to get a Samsung F1, I would still need to access my mac files from Vista's partition (when I boot into Vista) as well as from my HP Vista laptop (over wi-fi). FYI: I have no use for Time Machine, since I've never deleted a file which I needed to recover..well, maybe once or twice. What I DO need is a utility to synchronize files across machines. Hence, I will need some kind of program to automatically sync my iMac files with my HP laptop files. Currently, I utilize SyncBackSE to sync files between my HP laptop and my PC over Wi-Fi every morning at 6am. Works like a charm.
That's my dilemma in a nutshell. Any comments, suggestions and words of wisdom are welcome.
P.S. I'm also planning on upgrading RAM to 4GB. Newegg.ca is running a promotion (http://www.newegg.ca/Product/Product.aspx?Item=N82E16820227251): $72 CDN minus $20 USD mail-in rebate. It's not related to my question in any way, but some Canadians might find this info relevant.

Answer 1

Well, I don't have the budget for both and as I've already pointed out, Time Machine does not address my needs. It's a great backup solution, but what I need is a synchronization solution. I need to have the same versions of basic files, such as music, photos, documents, and other miscellaneous stuff on my iMac and my HP Vista laptop. Even if I were to get a MacBook in the future, I would still need the same set-up. That way, if something happens to either my iMac or my MacBook, I would always be able to simply copy-paste files from one machine to another. That's, sort of, my version of a perfect backup solution...unless, there's an option to load up files from a Time Machine backup onto a separate one (e.g. MacBook). In the end, Time Machine only partially addresses my need in keeping 2 machines backed up in a sense that it only backs up one of them. My solution kills 2 birds with one stone. I would have 2 syncronized computers (e.g. iMac + HP Laptop, iMac + MacBook) AND both computers would serve as mutual backup sources, since whatever happens to one of them, I would always be able to copy data from the other.
The problem arises when I factor in the sheer number of gigabytes required on the portable computer to mirror everything from the iMac, whether be it a Windows laptop or a MacBook. I would always have more data on my iMac than the available space on a smaller hard drive. I now have 432GB of stuff and I can presume that this number will only grow. Hence, at any given time I would be able to synchronize only the most essential files to the laptop. Ideally, I would need a NAS which would collect = synchronize data from both machines. That way, whenever files get modified, changes would automatically be transferred to the NAS and routed further down the chain to the iMac. It would work both ways, obviously. In that scenario, I don't need to worry about any of the computers, since whichever one fails on me, I would always have a copy of the entire collection of files. Now, that I doubt Time Machine can accomplish.