If you are thinking of upgrade go for E8500 and aftermaket HS and fan in this case it worth
What? I'm assuming that your saying that if he upgrades to the e8500 he should buy an aftermarket HSF and this would justify it? I'd still just keep your stock HSF that came with your e8200 and OC it easily to e8400 speeds. Mind you, you'll need to watch your temperatures, but you should be able to OC it, if you really think you need to. The biggest change for gameplay is your GPU (in general), so you could upgrade to 3870x2 or even the 9800 GX2. Just make sure your PSU can handle them and you'll be fine.