1.- Probably, in the near future.
2.- I dont think so.
3.- The gtx 650 I already had and the CPU is pretty much the one I want so for the motherboard I'd say about $50 to $100 bucks, preferably something around the middle.
4.- PSU: cooler master extreme 2 625w, Chasis: cooler master K550 mid tower. RAM: 2x kingston 2Gb ddr2 pc5400 667Mhz.