I've had two Gorilla Glass phones, Galaxy S & Galaxy SII, both of them got scratches on the screen. I'm very gentle with my phones too, it's probably because of the nature of my work to be honest. My point is, Gorilla Glass can get scratched, quite easily.
Doesn't the Maxx have Gorilla Glass 2 or something like that? I thought I read that somewhere, I dunno, I could be making that up.
I won't be getting my Maxx for a little over a week, but I will be rocking a screen protector day 1. My favorite screen protectors, oddly enough, are the cheap ones you find on Amazon & Ebay. They only cost like $1 each and they work and look great. They do scratch fairly easily, but they're cheap enough to where you can replace them once a month. I tried a ZAGG on my Galaxy S and hated it. I couldn't stand the rubbery feel, and worst of all, when you looked at it from an angle, it had a TERRIBLE orange peel like texture to it. So gross.