JY ... question is, how much power doo you want? If for full 3D then 10S if not you can get away with 8S. For me, might as well go with 10S. Again, you on a budget or do you want to splurge?

Budget

ESC - DualSky, Turnigy 90A HV
Motor - DualSky 6360, Hyperion 5025 (this is not cheap stuff but its just cheaper than the premium brands, this is a good motor, I would say take this)
Batt - Zippy Rhino 20C 5S 4,900 mAh in series (only USD86 each and does not bloat)

Money is no issue

ESC - CC 85/110HV, Jeti
Motor - Hacker A60, Plettenberg Xtra30, AXI 5330
Batt - Flight Power EON 5S 5,000 mAh packs in series

All the above set up will allow you to fly a 15 lbs 80" plane later on, not to say with hard 3D flying but you can fly a nice 50cc plane for scale aerobatics.