Well, perhaps the best question to start with is "What is your budget for the radio (transmitter)?"

Only computer radios have model memories, so you're going to go with a computer radio.

I think Hitec is going to discontinue their Flash5 radio soon. I scored one on ebay for my dad for $156. That is a screamin' deal, since it included a receiver, receiver battery pack, charger for receiver and transmitter battery packs, and 4 servos. It just so happens that it will easily plug into my radio so I can train him. The Flash 5 has 5 model memories and 5 channels. (the 5th one being for retractable landing gear or flaps)

I bought an Optic 6, with Spectra module, which has 8 model memories. It cost $220, but didn't come with a receiver or servos, so it wasn't such a good value.

I'd look on ebay, find a lightly-used computer radio and bid. The Futaba 6 channel computer radio is kind of a stripped down radio for the money. Most people prefer the Optic 6 for about the same money.

If you can wait a couple more weeks, Spektrum is coming out with their spread spectrum radio. It includes servos, receiver and never needs crystals. As long as you're doing smaller parkflyers and not huge models at more than 1/4 mile distance, it should be just the thing.

Jeremy