Of all the radios i have range tested (quite a few different ones) the 11X has the best overall range.

once you install the AR8000 in your aircraft I still recommend doing a "walk range" test..

I never rely on the Power down range check.... I have been in hobby for 34 years and have seen enough aircraft crash (not mine) due to loss of radio contact at a distance.. which ended up being a loose aerial in the TX....

So I fully range check every new radio / rx and installation..

Never had a loss of control in flight.. and I did find one faulty Spektrum clone receiver by doing this.. it only range checked to 150 meters... so I never used it..