I did the exact same thing a few days ago, and I am tickled pink. I had the same reasons you did; moto radios, battery life, and quality. The screen is quite pleasing; I had a rezound that had superb resolution but I'm just as happy with the Razr Maxx.
I was going to be a hardcore holdout for a 5 inch phone, or at least a bigger screen... but I realized that when I really want screen real estate, I pull out the tablet- I have a Nook Color and an Asus Transformer 300 (love that tab!). The Maxx will feed them both WiFi with that great radio, so its the best of both worlds.
One other, and BIG consideration... was that the Moto call quality is the best of any phone I've had. Sammy, HTC, etc., they are good phones but just don't have the voice transmission quality of the Razr. I want to hear and be heard well; that's the basic reason I have a phone anyway.
I put a MAXX and a GNEX side by side, and I thought the screen size on the gnex would be a big factor.. but the extra .3 inch really doesn't make that much difference. Maybe a 5 inch would stand out a lot by comparison. I can't see having much buyer's regret over that. I have a solid phone with unlimited for 2 more years, at least. Works for me.
Cheers,
SteveRN