The other threads linked in this one sound like a good read for first time builders, maybe you would want to look through them to help make extra sure that you don't make any mistakes and it might answer some of the questions you may have: http://www.tomshardware.co.uk/forum/288241-13-faqs-buil...
I would also like to say that I'm not going to click all those links, so if you want any more of my help then I would like if you wrote down the model name next to each link, so that I don't necessarily have to click through to each page to see what parts you are thinking about. Alternatively you can wait for someone who is willing to click all those links.
The i5-750/760 is about the same price as the i5-2400 and you can get a socket 1155 motherboard for the same price as that Asus 1156 mobo. Seeing as Sandy Bridge is all round better than Lynnfield, so I think you might as well go for that. Another reason is that if you aren't gaming the i5-2400 has an integrated GPU which neither the i5-760 nor the Asus P7P55D-E LX have and the only Lynnfield CPUs which have iGPUs are dual cores.
I'm somewhat unclear whether you want to game with this build, so I'll just present some options:
hi guys thanks for the advice. im not to botherd about gaming and if i was the games would be turn-based strategy.
any way iv got a while till i have all my Components the cpu will be first and i found this today what do you think....
Getting that would be beneficial for two reasons. 1. It is unlocked so you could overclock it more easily than a non-K. 2. It has the HD 3000 graphics rather than the HD 2000 graphics of non-K chips, so you have more potential graphics performance.
That means that to get RAM to run at 1600/2133MHz (above 1333MHz) you have to manually set it to be so in the BIOS/UEFI. Which was quite easy to do anyway with the old style bios, but is even easier with UEFI and Sandy Bridge's memory controller.
Another thing is that it is always possible to run RAM at a slower frequency than it is rated for. So you could buy 1600MHz RAM and by default it would run at 1333MHz on the MSI P67A-C45. But like I said, it would be really easy to set it as 1600MHz.
I think I would just go for the set that you linked in the OP because £32 is quite a good price for a set of 4GB 1333MHz DDR3 memory. Altho the difference between that and a good 1600MHz set will only be a few pounds, so if you feel it is worth it then it's up to you.
If you aren't going to buy a dedicated graphics card (at least straight away) then you will have to choose either a H series (H67) or a Z68 series chipset motherboard as the P67 series don't support video outputs that you'd require to make use of the integrated GPUs on Sandy Bridge chips. Z68 also has the advantage of SSD Caching, which would allow you to buy a small SSD (below 120GB in size) to help speed up some of your most often used programs - might be an idea for future upgradeability.
Both are good, but go with the one that is cheaper.
thanks again AznShinobi the cheapist out of the two is the GA-Z68X-UD3H-B3 at £129.99 thats the one im starting to like the most but the P8Z68-V PRO is a sweet looking mobo but at £150 im not sure.....