The decision to go 2GB of RAM rather than 4 was one of cost; I can splurge later, and pick up an extra 2GB without having to change anything significant about the system. Same with the hard drive - I have about 95 GB right now in a pair of IDE drives. One of the reasons I picked the motherboard I did was that it's got an IDE slot, so I can just port everything over. I don't tend to keep a lot installed at one time (usually WoW and one other game) plus whatever stuff I've downloaded. Since I'll have a nice burner again, I'll be able to clear things out rapidly. 160GB is, I think, more than enough for now. And heck, if I decide I want to add more room later, there's still going to be four SATA slots sitting open.
I don't think I'll be picking up a 64-bit OS in the near future, so the question of memory addressing does come into the RAM decision too. Anybody have much experience with a 64-bit OS? Is it actually worth getting one?
The problems with the 8600, though, concern me. That kind of thing is why I posted this. If it's just not worth the money, I'll check out what else looks good. Let me see here... hm. I'm starting to see what drothgery means about supply problems. The price jump between the 8600 and the 8800 seems to be about $100, more than I'm really wanting to spend on the card. I'm wanting a card with 512MB of memory, and all the Radeon 3850's with 512MB are out of stock atm.