It all depends !
If you want a hand held that is fixed into the aircraft using an antenna that is fixed to the aircraft you can find a number of these but the range is a bit lim mite as is the intercom options.
If you have a panel mount then it is between Becker and Trig, the gliding community favor the Becker because of the lower power consumption..... Both are utterly reliable and this has a value that lasts far beyond the initial price tag.