my brother would like me to build him a gaming computer for $1000.
he has a EAH6850, a 600W PSU by gigabyte, a HDD, DVD drive and all the bits and piece like a keyboard and mouse so that leaves the case, mobo, RAM, processor and a cooling systerm.
(we live in queensland australia so a good cooling systerm is importent)
i have never done overclocking before but would like this build to be able to be overclocked later (after ive tried it on my own PC).
i almost forgot, he likes the Lian Li Lancool Black PC-K63 case but the case isn't all that importent.
If your brother is strictly doing gaming, he should definitely get the i5 3570k, as it has much better performance on lower threaded applications like games.
so this is the list so far http://pcpartpicker.com/p/oiRi (note that it does not have a price for the case but it looks like i can get that for around $180)