The mrs and I are expecting our first baby in January. Wary of the fact we're not going to have a lot of money, I'm also aware that my current set-up is getting a little ropey for computers games etc, and I can't have that 
Current
C2D E8400 o/c to 3.7Ghz
Biostar Tpower i45 motherboard
4GB Corsair TwinXXMS2 memory
GTX 260 896MB
OCZ Vertex 2 60GB SSD drive
It's also pretty end of the line as it's last generations parts. I gave myself a budget of just £200 as it's simply the limit of what I could afford. Having done a wee bit of research I've bought the following.
AMD Phenom II X4 955 Black Edition "125W Edition" 3.20GHz
Asus M4A88T-M Motherboard
8GB Corsair Vengeance Blue memory
Adding this stuff to the rest of my existing hardware. Obviously the CPU will be undergoing a bit of an overclock. I'm gutted as I have a Corsair H50 water cooler but I've lost the box it came in, along with the AM3 parts
Means I've had to go with air cooling for now.
Any thoughts/opinions welcome? Also curious what kind of speed advantage I can expect. I saw a few comparisons between the E8400 and X4 955 which seemed to suggest I could get as much as a 50% increase?!

Current
C2D E8400 o/c to 3.7Ghz
Biostar Tpower i45 motherboard
4GB Corsair TwinXXMS2 memory
GTX 260 896MB
OCZ Vertex 2 60GB SSD drive
It's also pretty end of the line as it's last generations parts. I gave myself a budget of just £200 as it's simply the limit of what I could afford. Having done a wee bit of research I've bought the following.
AMD Phenom II X4 955 Black Edition "125W Edition" 3.20GHz
Asus M4A88T-M Motherboard
8GB Corsair Vengeance Blue memory
Adding this stuff to the rest of my existing hardware. Obviously the CPU will be undergoing a bit of an overclock. I'm gutted as I have a Corsair H50 water cooler but I've lost the box it came in, along with the AM3 parts

Any thoughts/opinions welcome? Also curious what kind of speed advantage I can expect. I saw a few comparisons between the E8400 and X4 955 which seemed to suggest I could get as much as a 50% increase?!