well, since you asked, and im bored i'll go ahead and do it

Intel Core 2 Quad Q9650 3.0GHz LGA 775 95W Quad-Core Processor ($559)

ASUS P5N-T Deluxe ATX Intel Motherboard ($225)

mushkin XP ASCENT w/ eVCI technology 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory ($139)

EVGA GeForce 9800 GTX+ Superclocked Edition 512-P3-N874-AR Video Card ($210 x2 = $420)

MSI TurboStream 1000W 1000W Power Supply ($209)

Western Digital Caviar GP 1TB 3.5" SATA 3.0Gb/s Hard Drive ($140)

LG 22X DVD±R DVD Burner Black IDE Model GH22NP20 ($23x2 = $46)

total $1822

+liquid cooling.. roughly another $200 so your looking at about 2k. and you get newer and better graphics, faster ram, and faster CPU.

what you dont get, thats included in your alienware, is the alienware case, and the alienware patched windows os. but also at $1500 less

and if you want to go into speakers and monitors.

22inch wide screen monitors now go for as low as $200

logitech z-5500 speakers (updated version of yours) go for $180 at times @ dell.com with free shipping (i bought one in feburary at that price)

and lets throw in a soundcard in there, razer baraccuda $130

and lets go buck-ass wild with a logitech g15 keyboard and g5 mouse which costs about $120 combined

so after all that tacked onto the 2000 dollar tower your still at under 2700, and this system will run circles around yours, and no i didnt go pick the cheapest parts possible, their all high-end, and totals $800 less than yours.

*all prices are directly quoted from newegg.com