PC Power and Cooling make many of the Corsair units. The decision comes down to whether you need 60A or 70A on the 12V rail, and that will depend on the gear you want to run.
Looking to run 2 radeon 4850's
MB GIGABYTE GA-EP45-UD3P P45 775
CPU INTEL|C2D E8500 3.16G 775 45N
500g hard drive
2 120mm fan
1 250mm fan
1 disk drive
and 4 x2gig sticks of ram