I bought a new Dell T3400 earlier this year on Sale for $900.
Came with Windows XP Pro, NVS-290's, and 4 Gigs of PC2-6400 ECC RAM on an Intel Duo-Core E8200 Processor @ 2.66GHz and L2 Cache of 6MB with a 1333 MHz Front Side Bus.
Handles all of my trading needs with no problem at all...