I wouldn't wait for DDR. Games at high res are Video limited, and office applications are human input limited. Some games benefit some from the higher speed memory but not that much and it will be pretty pricey at first and I think that it would be good to wait a while for the DDR bugs to get worked out

Let someone else be the Guinea pig.
[*]MSi K7TPro 2A
[*]Athlon/TBird whatever speed you want to pay for
[*]256+ MB PC133 2-2-2 RAM (I'd personally go Micron 7E becuase I can get it really cheap where I live, but any PC133 2-2-2 will do fine)
[*]IBM 75GXP whatever size you want
[*]Elsa GeForce 2 GTS probably spring for a 64MB (the Radeon is nice to, but I had one and the drivers were horrid...:frown

[*]SBLive! X-Gamer/MP3+/DE 5.1 (Games, MP3 software or both?) the TB Santa Cruz looks nice to...but I like my SBLive because it works in all the games I want and have no complaints...
[*]Toshiba 12x I think....my Pioneer is getting on my nerves, it reads CDRs and CDRWs quite poorly at times.
[*]Yamaha 8x8x24 if you just want to occasionally burn or Plextor 12x10x32 if you will burn alot.
[*]Don't much about UPSs sorry
[*]Lexmark Z51 (my roommate has one and I love it, might be a bit pricey but we got it pretty cheap)
[*]Logitech Cordless freedom pro. I love this keyboard...kinda hate the mouse though. USB or PS/2 and cordless

The volume up/down buttons are kinda handy to. So are the winamp play/next/prev/stop if you are in a game.
[*]I like my 450Watt powerwin but the 300Watt powerman that comes with below is good to.
[*]InWin Q500N 11 drive bays and solid construction lots of room and no sharp edges. excellent motherboard tray. And it can be a desk extension

[*]3 80mm standard case fans 2 input, 1 exhaust + 1 exhaust in power supply.
[*]I'd go for an FOP32, the YSTech 26CFM fans are pretty good and not obscenely loud but those 38CFM deltas (FOP38) are absurd....or maybe an Alpha PAL6035, but I kinda like the FOP32 becuase it's cheaper and they perform about the same.
Oh yeah you didn't ask about a mouse, get an optical one I favour the Logitech basic Wheel mouse optical but they are all pretty much the same just find one whose shape you like.
I dunno how close this is to $3000...probably a bit short but I wouldn't try to fill it up just to make $3000, save some and buy an NV20 in 6 months when they are (hopefully) cheaper. Unless of course you can't save the extra for some reason.