Here is the computer recommended for DIGI:
The Original Under $600.00 System (Digi Approved)
This is my favorite PTLE setup, achieving 32Audio + 24Aux and 280 simultaneous plugins on the Davec PTLE Torture Test. XP2500+ is one of AMDs best performing processors, and can be run at over 2.4Ghz with this setup. That is equivalent to an XP3600+ or P4 on steroids. Watch your cooling if overclocking this bad boy.

Enermax CS-3051L-B3A (Black)Aluminum Case with 350W PSU 58.00

Thermalright SK-7 Heatsink (no fan) 19.99

Panasonic Panaflo L1A 80mm (fan for heatsink) 8.00

A7V333-X or A7V333 FSB333 Motherboard 68.00

AMD XP2500+ Barton FSB333 88.00

Micron 512 MB PC2700 DDR SDRAM 81.00

ATI Radeon 9000 64Mb DDR 4x Dual Video Card 54.00

Western Digital 80GB 7200RPM 8MB CACHE Hard Drives 85.00 x 2 = 170.00

Mitsumi FDD 1.44MB 3.5INCH Black 8.00

Lite On 52x32x52x Black Color CDRW Drive LTR-52327S 42.99

Total= $582.88 

http://duc.digidesign.com/showflat.php?Cat=&Board=UBB32&Number=360675&page=0&view=collapsed&sb=5&o=7&fpart=1