Plusi

I would like to upgrade my current system to keep up with some of the more demanding games that are coming out, however I've hit a bit of a wall with my computer...it's a small factor machine, so parts are harder to find, and while it saves space, it is a right farce to update.

My options are to update this computers CPU, which would probably cost me between £100 to £150. I'm limited to AM2+ as my mobo is unlikely to be able to cope with an AM3 processor, according to the people who I bought the computer from, so once AM2's are phased out, my computer is pretty much at the end of its lifespan.

My other option is a new computer entirely. I only bought this one a few months ago, which was sort of a panic-buy, due to my other one breaking. This time, I want to get what I want, and I think I've found a great price, but I would like somebody to cast their judgement and let me know what they think...

MoBo - ASUS® M4N78
CPU - AMD PHENOM II X2 545 SOCKET AM3 (3.00GHz/6MB CACHE)
RAM - 2GB CORSAIR XMS2 DUAL-DDR2 800MHz
Graphics Card - 512MB ATI RADEON™ HD 4670 PCI EXPRESS
Hard Drive - 640GB drive with a 16MB cache
450W Power Supply
Enhanced Cooling

I'm thinking of getting Vista Home Premium 64bit with it too (which comes with a Windows 7 upgrade voucher)

The price of the above is £466. Baring in mind that this will be a computer used mainly for gaming and a few other hefty applications, would it be a good performer? I've looked at benchmark tests for the graphics card, and it seems to be a good one. I'm just a bit dubious about spending this amount of money, but to me, it looks a very tempting price for what I'm getting! It does not include a monitor, keyboard or mouse as I have those anyway.

Any help would be great. Thanks!