moogle
No reason not to, but the Corsair one mentioned in this thread is a modular one.
So is the Seasonic I linked, and with arguably a more useful set of connectors than the Corsairs
Seasonic M12ii-430W modular
* 1 x 4pin ATX 12V
* 6 x 4pin Molex
* 2 x 6pin PCI-E Power
* 1 x 8pin CPU +12V
* 2 x FDD Power
* 6 x SATA Power
Seasonic M12ii-500W modular
* 1 x 4pin ATX 12V
* 8 x 4pin Molex
* 1 x 6+2pin PCI-E Power
* 1 x 6pin PCI-E Power
* 1 x 8pin CPU +12V
* 2 x FDD Power
* 6 x SATA Power
Corsair HX520W modular has less SATA.
* 1 x 4+4pin CPU +12V
* 10 x 4pin Molex
* 2 x 6+2pin PCI-E Power
* 1 x 6pin Workstation
* 2 x FDD Power
* 4 x SATA Power