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I have only checked out Mikes, only problem there I only saw evolution engines.
It might have changed but they had OS, Evolution, and Thunder Tiger two strokes last time I was there. If you go over there again, ask one of the guys if they have anything in stock other than the Evolutions. My experience has been that they are very helpful but sometimes you do have to ask or they assume you want to be left alone.
If you can get over to Hurst, Roy's has a good airplane selection and they had a lot of different engines a few weeks ago when I was there.
I will most likely go with a avastar or a sig lt-40
The Avistar & LT-40 are both very good. The Hangar 9 Alpha or Arrow, or the Thunder Tiger Trainer, would also be good choices. Really, most of the 40 size balsa trainers are pretty similar. If the hobby shop has several of these to choose from, pick the one that looks best to you.
Do most radio's come with servos's and reciever? or do I need to buy seperate? If Im buying seperate any suggestions on which to go with.
Most radios are sold as a full system with transmitter, recceiver, servos, batteries, charger, etc. A few are sold as transmitter only or transmitter/receiver only, but they are often high end models. I've seen very few 4 channel models offered as transmitter only.