take it from me, i build servers every day, and i've built more personal, gaming computers than most everyone here. a few things you want to consider:
1) monitor - you can pay $50.00 more and get a 22" widescreen, if size is all you're concerned with
2) power supply - that won't cut it at all. at least go with a better name, like Antec, and do your research on what the power draw is going to be across each rail... buy your power supply accordingly. a 2000watt power supply means nothing if it's all on the 12v rails, and you need 5v, etc. etc. etc.
quad-core is the future, it really is. in some of my tests, a single quad core performed MORE than TWICE as fast as 2x dual cores. it's got to do with caching, but anyway, good pick... keep in mind that the processor alone will draw 175watts easily AT IDLE.
you think THAT'S bad - the graphics cards will draw probably a good 300watts between the two of them. under load, expect to see 400-500watts.
that means that graphics cards and CPU alone, you're going to need a power supply capable of supporting 700watts RMS (continuous). factor in fans, lights, motherboard, hard drives, optical drives, etc... and that number gets dangerously close to 1000Watts.
3) hard drive - get two of them. a computer that powerful, you ought to have RAID, if only for bragging rights
and if not, then you want a backup drive anyway
4) floppy drive - for what? computers haven't come with floppy drives in years. you don't need them.
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