Going from 2 channel with a 15 year gap I would lean toward a trainer for sure but you can really do alot with a trainer and most are 4 channel w/ ailerons.
There is a good list here:
http://www.rcuniverse.com/forum/m_4537845/tm.htm
Can't help with your old radio. I am not sure if you can get compatable receivers.Someone else may chime in on that one.