I like that Dell E1705, just configured 2 of those for people in the past few weeks.
* Intel® Core 2 Duo T7200 2.00GHz.
* Express Upgrade to Windows Vista Home Premium from XP Media Center Edition (Free).
* 256MB NVIDIA® GeForce Go 7900 GS
And it comes out to $1468.
The processor will give you the necessary power to deal with any amount of multitasking that you can throw at it (Its like an Athlon 64 5000+).
The Vista upgrade is free, so why not, just save $160 right there.
And the videocard is powerful enough to run even the latest games smoothly, so Starcraft and Warcraft III should be absolutely no problem.
Its a 17" screen too, so it'll be an excellent desktop replacement for college. I plan to get something like this as well in a year or so when I go there.