by just spending a couple of thousand you can get the i5 at 3.4 ghz price 23k.. that additional 400mhz doesnot do any harm, and price difference is not much either.. plus it can boost to 3.9ghz as well..so you would be set for atleast 3 years.
i myself will upgrade only to that processor.
for PSU however, going for an expensive psu just for haswell is not recommended, since you would be gaming on it and NOT putting in suspended idle mode all day .. instead of wasting money for a designed for haswell PSU, get a PSU wich can support a solid 40-50 amps on a 12v or a dual 12V with sufficient power.. rest of the PSU specs dont matter as most PSU are already way over the specs of 3.3 and 5V.
just some info.. xigmatec PSU have had issues in warranties..also according to review sites, they are not upto par on performance and use inferior components..you could get Corsair HX series, or the CM GX series , a one time investment for long term durabilty and performance. . FSP is another great PSU maker if you can find .. otherwise Antec is a solid PSU availble from iamextreme, but they are over priced for the amps on 12v.
as Striker said, 7950 is probably the best bang for buck as at 30k you cant get that myc performance in anything else.. or you could hunt for bargain on PG forum and find a slightly used in warranty GPU and save more or get something even faster.
Ram.. any DDR3 at 8GB is enough.. no need for OC rams.. as they are just over kill.., XMS3 would be more than enough
Mobo.. chipsets rarely matter, but what matter is connectivity on board.. a good H87 board from intel costs 12k.. boxed mobos cost a lot more for same features just cz of boxes.
MOST MOST important
get yourself a very comfortable and solid grip, large keys keyboard and a comfy grip large high DPI mouse.. wired mouse.. wireless is not meant for gaming FPS.
there is NO gaming without a solid mouse and keyboard..
but donot go for overpriced and overhyped Razer ..logitech is enough.. if you can find a microsoft mouse, you will love it.. so will a dell or microsoft keyboard.
bachelor on PG forums and over here is selling logitech G10-11 keyboards for a very reasonable price.. you should contact him..