KO make good servos, but I've always thought their radios are crap. Back when I used to run race control (in the 40Mhz days) it was always drivers with either cheap radios or KO radios complaining of interference. These days its binding issues and latency instead.
I ran Futaba from the late 90s until the end of last year. The FF3 was really a fantastic radio. I then ran the 3GR 2.4GHz for about 5 years and couldn't fault it for responsiveness or reliability; it's a proper 2.4Ghz set without any slow conversion modules and is good value for money.
But the radio just didn't quite feel the right shape for the hands, so I switched to Sanwa and love it. I never even think about where the radio is or how it feels now, its much more natural.
So for me yes it's too late, my Futaba stuff is all gone, and I love the Sanwa radio, and their waterproof receiver for my wet car.