You might want to check the RAM again. At the price you've mentioned you're buying DDR2 RAM (
Novatech 4GB (2x2GB) DDR2 PC2-6400C5 800MHz Dual Channel Kit)
for a motherboard that takes DDR3.
If the budget will stretch I'd get 2x4GB to cover eventualities over the next few years. Just make sure you're buying a 64-bit OS (you appear to be given the price mentioned).