regarding flight packs etc.
I am in a similar position - I have an Aerobird Extreme and am pondering what to do next. Which plane, Tx etc.
On the one hand.... The Aerobird 3 channel transmitter is compatible with Parkzone Striker, the Slow-V etc. so it can work with other planes in the "family". I've had good luck with it, no complaints, good range, simple, etc.
On the other hand.... In glancing at Tx with model memory, the Futaba EX?? is about $99 alone. Seems like an excellent value. Much more flexible (like V Tail, Elerons?,) so it would take me far along the path. The arguments for going "open" are correct and compelling. Why else would "everyone" who gets the least bit serious get sytems outside of proprietary stuff (greater choice, better quality, future compatability)?
Also, I read an add in the Aug/Sept BackYard Flyer that HiTec has a 6 channel Tx with synthesized frequency (no crystal) so that would mean you could have planes with recievers set to various channels and use a single Tx without changing crystals in the field.