Hi i recently got a bit of spare money so thought id upgrade my PC, my old p35 setup has served me well but think it finally needs updating 
Could somone make a spec for both:
1: Main Tower unit + OS
2: Main tower unit + nice 24 inch monitor + OS
I currently have a 1920x1080 21 inch which isnt bad but i think if i were to get a high end card, games would be much better on a 24
Overall im looking for the best possible spec for gaming i can get and something that will last a while. Also as im not that competant at building PC's im thinking about this prebuilt too http://www.overclockers.co.uk/showproduct.php?prodid=FS-175-OE&groupid=43&catid=1917&subcat=
thanks to any suggestions.

Could somone make a spec for both:
1: Main Tower unit + OS
2: Main tower unit + nice 24 inch monitor + OS
I currently have a 1920x1080 21 inch which isnt bad but i think if i were to get a high end card, games would be much better on a 24

Overall im looking for the best possible spec for gaming i can get and something that will last a while. Also as im not that competant at building PC's im thinking about this prebuilt too http://www.overclockers.co.uk/showproduct.php?prodid=FS-175-OE&groupid=43&catid=1917&subcat=
thanks to any suggestions.