Frank, In your position, I can understand your concern. My take on this is as follows. 2.4 Ghz technology is not new. It has been around for quite a long time and is in daily use by many use-critical entities. Hospital medical gear, communications, and of course the military. The AMA has tested it thoroughly and have authorized its use in all of our flying models, and of course they back up that blessing with their insurance policy. The technological folks, engineers etc, who understand the system and how it really works, tell us that it is so far superior to our old, quite vulnerable, 72Mhz stuff as to be not even in the same realm.
Old habits and ideas are difficult to let go...for example, the need for a frequency pin. It reminds me of when we only had radio...TV was a new gadget. The nay-sayers said it's just a fad...it'll never last. Well, we all know better now don't we. I am flying all of my aircraft on 2.4...and have been for some time. Gas, glow, etc and I have never ever had the slightest hint of a glitch...and my flying club is the largest in the nation. Over 400 members.
I cannot give anyone an absolute on anything, but my money is on the 2.4 ghz system, and I will fly it at Top Gun this year too.
Wishing you the best.
Jim