help speccing a new base unit please

[S.A.S]

hi guys a friend wants me to spec him a new base unit, he has 500 pounds to spend and he will mainly be doing video editing, a quad core is a must.

he will also need a spare pciex1 slot for a blackmagic intensity pro.

any help would be great, he wants to order tonight

 

[S.A.S]

thanks for all the help, the top one seems the most promising with the possible CUDA support and the bigger hdd.

thanks for your help