What is the next step?... Hnmm... what is the capability of the radio you have? How many channels of control. what type of servo connections does it have? (maybe there's something that can use the same servos when you upgrade... maybe not. can't know without info.)

There is no real difference in capabilities of one brand vs another... one may have a btter pitch curve programming setup for Heli guys... another might have a better set of pre-programmed mixes for the guy flying Pattern or for 3D fixed wing or for gliders... That's just cmputer programming.

All 4 ch and up FM or PCM systems will have essentially the same range based on the transmitter. (the RF decks are virtually identical now... FCC limits max power output... there's your range limit.)

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Where do you want to go with your modeling? Then we can point you at the better choices for that purpose. If you plan on doing a B-36 with 6 gasolne engines and 4 turbines... you need the best 9 to 12 channel system money can buy. If you don't think you'll ever go beyind flying the Four Star 40... any 4 channel to 6 channel radio will do just fine. (no sense spending $1000 on a radio to control a $150 ARF...)