On the original point, if the Phenom is performing ok, then obviously an 8320 overclocked is going to be a lot better, and it represents excellent value. Game developers recommend an 8320/50 over a current i5 for next gen games because of the way they work -- in these the Phenom will struggle too, and so a CPU upgrade is a good bet, and can fit in with an excellent graphics card for 1080p gaming at £450ish.