As for Psu i use 6 years old enermax liberty 550w, its was enough for my last set of comps c2d 3ghz, then nehalem i7 920 on 3.8 and now for my i5 3570 on 4.5 ghz with amd 7950. You have to realize that every new generation of cpus use less power so buying those 1000 w psu is just a waste of money and totaly useless.
Just buy quality (platiňum or gold) Psu for more money.
As others recomended wait for edge release and then there will be a lot of becnmarks so that you can build a right pc for dcs.
I would recommend intel and any of higher end gpus. Always bet on quality mobo if you want to overclock. Ram gskill with low latency, use one stick with 8 gb and if its not enough buy another stick to use dual channel.
Go for ssd, samsung is the best right now.