I traded my Rezound in for a Nexus and I couldn't be happier. I liked a few things about the Rezound better than the Nexus like the auto brightness and the lock screen. ICS is seriously awesome. Sure, everything else will eventually get their own flavor of ICS. But I love knowing that this was the phone that Google intended the world to have. Everything else will just follow in the GN's footsteps.
But it's not just software. I love how the Nexus feels in my hand. It's big, but not gigantic. It's thin, but not RAZR thin (read: too thin). It's very very light. I can't believe there's a battery in there!! The Rezound felt very nice too. The heft made it feel like a serious phone, but not so far to make it a brick. It felt like a man's device, but somehow wore its weight better than my wife's iPhone. Side by side, the Rezound almost felt lighter. But the Nexus still has it beat. It's perfectly weighted like a Samurai sword. I like the Rezound's "rubber" soft plastic backing. It was very grippy and felt very secure. I could put it on my lap while driving and not worry about it sliding off. The Nexus feels equally premium, but it is definitely more slippery.
I enjoyed my time with the Rezound. It's a wonderful device and you should be very very proud to own one. but personally my Rezound's back cover never quite fit right. If I held the phone tight enough especially around the edges, it creaked and squeaked like an early 90's Chevy Cavalier. The Nexus is as tight a Navy submarine. When checking it out for the first time, my wife took the back cover off of the Rezound herself with in seconds. It took her a couple minutes with the Nexus (yes I let my wife play with my phones) It's flush and solid that she even asked if it's non-removable. Only a discreet tab at the top gives away the secret entry. You can press on the phone all you want and she'll never make a peep. There's a slight rattle coming from around the camera, but I'm not sure what's causing the noise. I don't think it's the cover. It sounds like something is loose inside, but it's only when I give the phone a little tap so maybe it is the cover. It's a little disconcerning...
Anyway, the store's demo Nexus may have had a poor fitting cover because it is a floor model. With a security device attached to the back and plenty of people carlessly pulling on it, I don't doubt that it eventually pops off. The should glue that sucker down to avoid giving poeple the wrong idea. But my opinion is that my Nexus may be made mostly of plastic, but it feel much more business like and premium than the slightly squeaky, perhaps portly Rezound. I would rather have a lighter phone than a super chunky one that's still made mostly of plastic.