I have a M11 with spektrum. Its a great radio, a little on the heavy side and I dont like how the spektrum antenna sit on the side. My buddy has a 3PK which he loves and has no complaints with. I used UE-Maxx's React a few days ago and was very impressed with how it fely in your hand. If I was going to but one today I'd take a serious look at the react. Fully programable, updateable via internet, and has all thes sensors for temp, voltage, rpm, ect...