I am not a huge fan of the font used in entry #1 (resler orthodintics). I would also like to see our company name more integrated. The actual logo (RO) part is a good start.
So far #18 is my favorite of yours. I really like this type of integration. Could you try some small (or large) variations of this style. Looking good. Thanks. #30 the O is just too big and seems to mask the R which is our name and very important in our branding.