I just ordered
Tactic TTX404 4 Channel System from Towerhobbies for 39.99, mostly because its cheap and I think it will do exactly what I want.
I want to be able to control the front and rear steering indepently at all times, I just don't see the need for a 5, 6, 7 channel system though, and I don't think I need any computerized features as well

. I'll report back with out the system is working for me.
Thanks
Disjaukifa