I am very happy with my Razr and have not found Blur to be a hinderance. After using my phone for a couple of weeks, I did a factory reset, installed the apps I need, and my battery life has been great - used to get 6 hours, now I get 12-14.
I played with the Nexus and the Razr tonite. I dunno. ICS felt like an upgraded Honeycomb that's on my tablet. I wasn't blown away by it like I thought I would. The Nexus felt really "plasticky". The Razr just felt better in my hands and feels like higher quality. So I ended up with a Razr bc IMHO I'm not going to tinker with the phone installing ROMs, etc. I just want a stable phone to call, text, surf the web, watch some videos. MotoCast is a big attraction for me as I like to stream media from my computer. The Nexus is probably a great phone, just not for me.