For motor kv: play with the speed calculator and see what looks best to you. You're limited to 6s with the MMM, so you'll probably be looking for something higher than 700kv. You might look at the castle 1520 (1600kv) - it's a great motor that won't break the bank:
http://www.rc-monster.com/proddetail...ermotor&cat=20
You would likely need a smaller pinion, but it should work.
Looking forward to pics.