Sanwa MX-V, hands down. Around $90.

Best price/quality ratio, very reliable, waterproof receiver, a lot of model memory, Sanwa quality.

I have a Sanwa Exzes-Z my own, but I have installed and worked a lot with Sanwa MX-V. It never let people down, simple as that. Much better than any alternative in it's price range.

For your own blood pressure's sake, stay away from GT(3) radios....Rebranded or not, these radios are terrible and above all, they seem to lose model memory quite occasionaly.