I am a glow diehard but now am into EP, both are fun. I think EP planes are best kept to about 35"-40" w/span and 20 oz if its about 3D. If its for sport flying then about 40"+ at 24 oz. That means you will be in the 400 sized motor range, it is most affordable. You then only need a decent brushless (prices are dropping like flies as you get more generic brands from China), ESC will need not be more than 30A (I used some El Cheapo esc that are NOT programmable, you only get to program BRAKE ON/OFF and 2S or 3S cut off is chosen by using a jumper switch, they work fine by me and only cost USD35), also batteries need not be more than 3S @ about 1,700 mAh. ANything more than this and you will feel the pinch of the lipoly cost.

I got a Multiplex MicroJet with a 400 sized brushless and it will go like stink, not as fast as Woody's hotliner but still will give me a decent 90 mph in level flight. Here are pics of my planes. I still love my YS110 and the pungent scent it makes but I will not give up my EP planes for sure! My Fliton Prodigy gives me real unlimited vertical, I can do a KE loops with her.