Try the following as a guide:

Motor - DualSky 3548-5, AXI 2826-10, Hacker A30-10XL
ESC - 60A, Turnigy Plush ones are nice, cheap and good.
Batt - 3S 2,500 to 3S 3,000 or 4S 2,500 to 4S 3,000
Prop - 13x6.5 - 14x7

If you build your plane really light you can get away with a 3S set up even, esp if you are not going to fly hard 3D. Mount the motor then plane the batts to get the recommended CG and then decide where to build the battery tray.