speaking from an instructor POV, this trainer is hands down the best on the market. You might spend a few extra bucks up front, but you wont have to go buying spare parts as you would with the others mentioned above. Its also offers a greater parts availability at hobby shops nationwide in case something does come up. Just thought Id mention...
best of luck

http://www.e-fliterc.com/Products/De...ProdID=EFL3100