Well let me chime in with my opinions here :

Futaba is a great brand of radio. I love them. I have a couple that are about 18 years old and going strong.

BUt I would avoid the computor radios at this point. You don't need them. You may never need them. If you get to the point in the hobby where you need that kind of equipment, you will likely have a half dozen radios.
Now, just to contradict myself, if you buy a top shelf computor radio, you will never need to buy another xmitter agian. They have memory for several models. Some even allow you to download digital photos of your plane into the xmitter to help you remember which program is for which plane. I just don't like to put all my eggs in one basket.

As for the TT engine. I wouldn't buy one. This is the key component that determines just how flyable a plane really is. Good throttle response and good power make or break an airplane. Although all brands are CNC manufactured now and have great tolerances, there is one very important difference. That is nickel content. Buy an O.S. Max. Their engines will last 10 years or more. The clones are trash in 2 or 3 years.

The Avistar is a very wise choice. It has a semi-symetrical wing that handles the wind much better than most trainers. The price is a slightly higher landing speed. But you will be able to fly on more days when the wind is blowing too hard for most trainers.