Jeff,
Nice to see your project on this forum.
The Maggiolinas have always looked like the quickest to deploy, but both the Hannibals and the Ez-Awns are popular in
http://vtxs.org/, the club in which I'm a member. Determine what is your most important feature is (length or ease of setting up, etc.) and go from there. All the RTTs have thier own plusses and minuses. I'm getting ready to build a sleeping platform to use when traveling alone in my scrambler that will work with the passenger seat flipped forward. A RTT on my jeep which is 6'8" to the top of the hard top would make it too tall for use on the trails in NE. An Oz-tent is on the purchase list for next season when I take a navigator along.
I look forward to commenting more after I have time to read this thread in its entirety.