New Upgrade Computer

I've been in the process of upgrading my PC over the past few months. I'm fianlly done. I have maxed out my wallet and to an extent my motherboard. I could install a hexa-core, but I'm not that rich.

OLD setup:
Motherboard: ASUS M2N68-AM SE2
CPU: AMD Athlon 64 X2 5000+ (Dual core)
RAM: 4GB (2x2GB) DDR2 667 (PC2-5300)
GPU: Nvidia GeForce 8500GT
PSU: Some ****ty 300W switching power supply
HD: 2TB (1TB internal / 1TB external)
New setup:Motherboard: The same as above
CPU: AMD Phenom II X4 945 Deneb 3.0GHz (Quad core)
RAM: Platinum 4GB (2 x 2GB) DDR2 1066 (PC2-8500)GPU: ZOTAC 1GB GeForce GT 240
PSU: Antec 550W (with 4 individual 12V rails with plugable wires, I like this because I can split the power load to keep my PSU running cooler)
HD: Same as above.