Over the last couple of months ive saved enough for my i7 system, I also put away a little bit for a pram and the nursery furniture that I need.
Unfortunatley the price of a pram, nursery furniture and other baby stuff is a little bit more than thought it would be, about the the price of an i7 system more

So I need a cheap upgrade to keep me going for the next 8-9months while the missus' isn't working and im skint.
I can spare about ~£300, Both my CPU and GPU need a upgrade which is why I was saving up, but I can't afford both so which is the priority? I was just thinking of throwing in a 5770 but would the cpu hold it back?
Current spec;
E2200 @ 3.33Ghz
8800GT 512MB
4gb DDR2 800
Gigabyte P35-DS3L
My monitor is 1920x1080, but I currently play at ~1600x900 to keep things smoother.
Gaming is the most stressful thing the PC does, although I have bought a HD camcorder too so I might want to edit a few bits if the PC is upto it. (another thing in my grand i7 pc scheme

)
I don't mind overclocking though I wouldn't want to overvolt stuff.