My vote is for the LT-40 with either the OS .46 AX or TT .46 Pro and the Futaba 6EXA radio. Remember to get the instructor to check your airplane on the first few flights. The radio would grow with you for a while (until you move to one of those 3D airplane). Both of the engines are very reliable. The LT-40 is very easy to fly.
The NexStar has the filght sim which is really helpful if you don't get a lot of real life pratice, but I've heard few ppl have problem with the landing gears. They come loose after few hard landings. For the same price ($400) you could get the LT-40, OS .46 AX engine, and the 6 channel computer.
If you'd like the flight sim, then Hangar 9 Alpha Trainer 40 has one in the package. They just started to include the flight sim. software in October. This package is about $289.99. Lots of ppl like the Alpha Trainer 40 as well. This packange only comes with the 4 channel analog radio.

Good luck and happy flying!