Just last month I was running on the following system:
Athlon 64 X2 4600 @ 2.6Ghz
Asus A8N-SLI Premium
AC Freezer
2GB OCZ Gold DDR3200
256MB 7800GT
I managed to sell this lot on the famous auction site for £210, each part separately. Great time to sell socket 939 stuff
I then purchased:
Intel Q9450 2.66Ghz @ 3.40Ghz (from MM)
Asus Maximus Formula X38 (from MM)
AC Freezer 7 Pro (new)
4GB OCZ PC2-8000 Platinum (new)
768MB 8800GTX OC (from MM)
For £335 in total.
So cost me all in all ~£125 to upgrade and its a HUGE improvement!
I then managed to sell my 8800GTX OC for £125 and I've just purchased a GTX 260 for £145 delivered
So another HUGE upgrade, for only £20!!! 
Looks like my system should keep me happy for another 2 years now as my old athlon dual core one did so I'm pleased. Any of you guys managed to upgrade for cheap?
Athlon 64 X2 4600 @ 2.6Ghz
Asus A8N-SLI Premium
AC Freezer
2GB OCZ Gold DDR3200
256MB 7800GT
I managed to sell this lot on the famous auction site for £210, each part separately. Great time to sell socket 939 stuff

I then purchased:
Intel Q9450 2.66Ghz @ 3.40Ghz (from MM)
Asus Maximus Formula X38 (from MM)
AC Freezer 7 Pro (new)
4GB OCZ PC2-8000 Platinum (new)
768MB 8800GTX OC (from MM)
For £335 in total.
So cost me all in all ~£125 to upgrade and its a HUGE improvement!
I then managed to sell my 8800GTX OC for £125 and I've just purchased a GTX 260 for £145 delivered


Looks like my system should keep me happy for another 2 years now as my old athlon dual core one did so I'm pleased. Any of you guys managed to upgrade for cheap?
