Couple offers for you:
Dell 860:
Quad Core Xeon, 2Gb Ram, 2x250Gb HD, 3000Gb transfer
$175/month if prepaid for a year
Quad Core Xeon, 2Gb Ram, 2x500Gb HD, Free Hardware Raid, 3000Gb transfer
$225/month if prepaid for a year
Dell 1950
Quad Core Dual Xeon 2.0, 4Gb Ram, 2x500Gb HD...