So I am thinking of buying an xbox one just after Christmas, however I'm in a dilemma as I sort of want a good PC as well as/instead of!
Ideally I want to buy a Benq XL2411T and connect my PC and xbox one upto it. Current PC will play all games I want such as quake and other older games. Or if I could find a cheap 120hz monitor that would be even better, could be 2nd hand or refurbished. Seen some Asus and Acer ones going for just over £100 on UK ebay but people say they aren't that great? bearing in mind it could end up JUST for quake and older games.

Basically for about £400-£450 what would you buy to upgrade my PC, I would need a motherboard, CPU, ram, graphics card and PSU.

Based off of UK prices please!