I have pretty much the exact setup that Brian recommends (different engine) and it has worked out well.

* The LT-40 is a good airplane.
* A .46 engine is a great match for the airplane.
* You'll never regret having a computer radio. It makes so many things much easier...take my word for it, and in the scheme of things they don't cost that much more than a non-computer radio.

Have fun.