I also upgraded my HT Gaming PC to an AMD Phenom II X6 Hexacore setup
here's the specs
Processor: AMD Phenom II X6 1055t 2.8Ghz plan to Turbo boost this baby to 3.2ghz
Motherboard: Asrock 890GX Extreme 3
Harddisk: 640GB Seagate Barracuda SATA 16mb
External Hard Disk: 1TB Seagate Expansion Go
Memory: G. Skill Ripjaws 2×2GB DDR3 1600 CL9
Videocard: Sapphire Cypress Pro HD5850 1GB GDDR5
Optical Disc: LG 22x Lightscribe DVDR SATA
Power Supply: Corsair HX650
Case: HAF 922 mid-tower case
HSF: Tuniq Tower Extreme 120
Additional Peripherals
Fan Controllers: NZXT Sentry 2
Multimedia Station: Antec Veris Multimedia Station Premiere
Additional new Internal Hard Disk: Western Digital Caviar Green 1Tb SATA Hard Drive
So far the last upgrade that I wanted with my PC is to get an additional Optical Disc which has a capability to just read a Blu-Ray I'm rooting for a Lite-On Blu-ray drive. And 1 additional HD5850 going for a crossfire mode.