We like #6 and #7. However, we're wondering if you can either make #6 feel a little more substantial or make #7 feel a little less heavy. I know that is vague, but those are the words that come to mind when looking at them. We like the square that defines #7 and think that we might like #7 better than #6 with the right tweaks.
After all is said and done, it looks like the group likes #3 the best. As part of the files that you send us, can you send us files in both .eps and .png as well as just the logo by itself (the picture without the words)?