Once again not my forte. I just buy motors that are recommended for a given size/weight plane.

One thing you have to know is what sort of amp load your electronic speed can handle. I use a Phoenix 45 ESC and the 45 gives you an idea of hw many amps the controller can manage. The bigger the motor the more amps it will pull AND the more current it will draw, requiring a higher capacity battery.

Something like this would work [link=http://www.newcreations-rc.com/ProductDetails.aspx?itemnumber=JEP153]New Creations RC[/link] with a Phoenix 45 speed controller and I 3 cell 2000mah lipoly.