[EXreaction]

I would look at something like this:
The Dell Online Store: Build Your System

You can use the coupon code
N4$2M7VJT5F59B

for 20% off if you configure it to $999+.

It won't do any gaming, but it would be very nice otherwise.

As for storing your media/school stuff I would recommend you look at getting an external hard drive for that. A 2.5" external to be exact (so it does not require an additional power adapter)
Newegg.com - 2.5", Western Digital, External Hard Drives, Hard Drives, Computer Hardware

Maybe this one?
Newegg.com - Western Digital My Passport Essential WDMEPN2500TN 250GB USB 2.0 Vibrant Pink External Hard Drive - External Hard Drives

Also, for more dell coupons:
Dell Discount Coupons, Dell Computer Coupons, Dell XPS Coupons, Latitude, Vostro, Deals - Dell.com