RE: Want a new 2.4 transmitter...Help me decide!!
From what you wrote, you really want the Airtronics.
The ONLY reason to consider the JR is your investment in Spektrum.
Selling the existing Spektrum stuff and replacing it with Airtronics would cost you some money, but, Spektrum is very popular. Heck, if you're willing to deal with selling on ebay, you could potentially make money if you can make it appear "rare" or "hard to find."