Don't settle on a radio that you need now. Look to the future and get the biggest baddest radio you can.
I never dreamed when I started flying I'd be where I am today, flying giant scale gasser using more than 1 channel on a single control surface.
instead go with a 10 channel radio, minimum, that will be able to handle what you throw at it as you grow in the hobby.
its cheaper too, buy a 6 now, then an 8, then later a 10, or just get the 10.
anyway good luck