Basically your options are:
Buy 2x1GB DDR2 667 MHz RAM for £28
Buy 4x1GB DDR2 800 MHz RAM for £60
Save up and buy a new system
na I'm not doing that. I like this system, never had any issues with it and I'm saving up for a macbook so it'll be a while before I get a new PC.
I appreciate what you're saying but is that 32 quid difference noticeable?