#49 is looking cleaner and more glossy. I'm still not sure that the logo represents, but I really like your style. If you have some more relevant concepts, I'd like to see your style applied to them.
#51 is simple, which isn't bad. However, we want to avoid using the text as part of the logo. You can use "Surreal CMS" in your concepts, but please ensure that the logo makes sense by itself as well.
#56 — it's very clever, but I still don't think it's relevant to content management. Nice effect with the cloud over the visor! It's a really good logo...maybe just not for Surreal.