Hi Jason, I know this is probably not much use to your poll but I use Multiplex radio gear with their superb IPD 12 channel Rx's which has 3x battery input sockets using built-in regulator circuitry for up to 6 cell packs. Probably the best r/c system available with the most powerful Tx signal strength I have seen. Mpx also invented the digital servo and is the preferred radio gear used by at least one NASA sub contractor company I know of for Mars Flyer research flights at around 100,000 feet.

In fact as the advert goes....Carlsberg don't make radio gear, but if they did it would probably be Multiplex.

Sorry if I sound a bit biased, best regards, Rob.