I rarely see Airtronic radios in my area.

Futaba is a nice radio, but in my opinion, overpriced.

I will speak blasphamy now.....I have a Polk's Tracker II and love it. If I get another radio, it will be a Tracker III. A FULLY synthesized 8 channel transmitter AND a fully synthesized 8 channel receiver with 1 servo for $200 (most people have preferences on the brand/type of servo, so in many cases, the servos are rarely used )