That being said, Sean's original design was close to #72... which was #1 for awhile. If you guys are comfortable "borrowing" from each other, I'm comfortable not feeling guilty about which design I pick.
Zrox... lose the weird E. It makes the logo seem classically Greek.
I personally hope you'll still keep #120 and #121 under consideration. I think the quirkiness of the backwards "3" (aka weird E) makes the wordmark quite distinct and memorable.