Also the extra channel means you have more capability of mixing things together; you can independently trim dual flap servos, dual aileron servos, dual elevator servos etc.

It would be a while before you needed more than 6 channels though, most likely not for first, second, third, or even fourth plane.

If I didn't have to pay, I would get my favorite 7 channel, for the programming options, etc. and know I would never have to replace it. Although I may never have to replace my 6 channel, depending on what kinds of planes I get myself into.

My suggestion is to get the 6ch. There are pros here who have been flying for decades who still don't need more than 6 channels. Spend the $100 on something else, like a nice OS 46AX or something