I have the JR 6102, I use it with my Eco-8.

Nice radio, lots of features, even some that I will probably never use. The thing I like the most is the graph that shows what position all the servo's are in, really helped me get it set up right when I was having servo travel problems.

It's not synthesized, nor is synth and option/upgrade, but that didn't really concern me because I never change channels as I fly alone.