I'm currently building a new boat kit and it's twin motored. It's been 
suggested that for best effect, I'm better off with one channel for each 
of the motors and one for the rudder. All my other RC stuff is two 
channel - in fact, I've got three transmitters for three different 
models, and this would now seem to be the chance to rationalise.

What I think would be best longer term (but I'm open to suggestions) is 
to go for a four channel setup. I'm unlikely to do any flying - I'm 
mainly interested in boats and cars. I've got a kit built car with an 
Acoms 27MHz AM system, a RTR boat with a Futaba 27MHz AM system and a 
kit-built boat with a 27MHz FM Futaba system, all two channel.

Can anyone recommend a four channel system that will see me through my 
current build and next few models and one that will ultimately replace 
my existing collection of transmitter kit?
-- 
David Morris