#1,#2, and #3- Design entry is interesting, contemporary... Readability of Letter "E" can be misread to be a "+" followed by "RMI". Additionally would prefer to have Medical Devices LLC on bottom of logo for legibility.
Currently we are unable to submit any revisions due to "top 5" phase of the contest. As this is new feature I'm not sure how it works but I suppose you have to rank designs and then it can go on.