Ultra X-Finity 600-Watt ATX Dual 80mm Fan SATA-Ready SLI Ready Black Power Supply w16x CD-ROM ULT31848 at TigerDirect.com
38 amps on the rails should be enough to handle Quad-Core a GTX and a couple other little things.
EDIT: Your going to need better than an arctic freezer Pro 7 to handle the heat of a quad-core...those things run HOT at stock let alone when trying to overclock.
if your going Quad-Core then yes a Tuniq is what your going to want
EDIT: Your going to need better than an arctic freezer Pro 7 to handle the heat of a quad-core...those things run HOT at stock let alone when trying to overclock.