Hello, I'd really like to build a gaming PC. I have about £600 maybe £700 budget. The monitor I have now is 1600 x 900 though I might upgrade it at Christmas to a 1080p. What CPU and GPU would you recommend if I were going to upgrade the monitor?
Are you going to upgrade the motherboard as well or are you planning to reuse the one you have? If so, what is the model number? Since the PSU is the most important system component, and most important consideration when upgrading, especially if you're upgrading both the CPU and GPU, what is the brand and model number of your PSU?
Also, do you have a preference regarding the CPU brand or series? There are some seriously good deals on very high performance Xeon processors right now with features and instruction set support that many of the comparable i5 and i7 cpus don't offer in that price range. The Xeon is much cheaper than the I series processors that do support equivalent features but it might not leave a lot of room for future upgrades since it's an LGA 1155 based socket.
Also, if you plan to overclock the CPU it may not be a good choice since it cannot be overclocked. My understanding is that the max turbo setting can be locked at it's peak however which would be the same as a nice small overclock. For overclocking, an AMD or I series cpu would be a better choice. If overclocking is not your intention then it doesn't matter.
Of course, if you already have a motherboard that's worthwhile, we can probably do much better in terms of component performance since we could put that extra money towards the graphics card.