WR2 :
Do you need to check compatibility with any other parts you're going to carry over into the upgrade?
Sure why not
AMD Phenom II X4 975 Black Edition Deneb 3.6GHz Socket AM3 125W Quad-Core Desktop Processor HDZ975FBK4DGM - OEM
ASUS VH236H Black 23" Full HD Widescreen LCD Monitor w/ Speakers
Seagate Barracuda Green ST1500DL003 1.5TB 5900 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
MSI R6870 Hawk Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
Antec BP550 Plus 550W Continuous Power ATX12V V2.2 80 PLUS Certified Modular Active PFC Power Supply
GIGABYTE GA-970A-D3 AM3+ AMD 970 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBRL
Rosewill RNX-N250PCe (RNWD-11005) PCI Express 150/300Mbps 2T2R Wireless Adapter
Rosewill REDBONE Black SECC Steel ATX Mid Tower Computer Case
COOLER MASTER RR-H101-22FK-RA 80mm Long life sleeve bearing CPU Cooler
Windows 7 Ultimate
Sorry for the long list