I have no doubt that the Rezound is a performer (hardware wise) from the times I've used one, but I wanted a pure Google (non-sense) and quick updates device, and that's the Nexus. (And no, I wasn't about to spend hours of my time searching XDA for ROMS to make the Rezound better. Just don't feel like it. If you're into that and have the free time, then power to you.)
Also the Rezound is a thick, heavy brick IMO, but that was the smallest of my gripes.
No idea why everyone has to heavily debate the two. They're not even really in the same category. Whatever you like, buy.
That actually seems to be an important factor to many people - build materials. A thick, heavy brick to you is a sturdy and well built phone to someone else. Some people don't like how light Samsung phones are due to a lot of plastic being used. I had a Sensation and that thing did feel like an expertly crafted machine compared to my Nexus.