Thanks for your replies.  We know we'll be at our max for towing with the Pathfinder.  We're even thinking about basing the TT down in Valdosta, where one of our children lives.  He's mentally handicapped (he lives in a developmental center), and we visit him monthly, using our camper as our hotel room.  We also do a lot of camping in FL, so this would cut down on the distance we'd have to tow the new TT.  I've towed a similar camper in the past with a Tacoma, so I know it's doable - barely.
Terry, I'm also leary of the Aluma Sky, since it's single axle and flat front.  I think we'll scratch it off our list.  It's also more basic than the other three.
The other three all have gas/electric DSI water heaters (one of the things we like), and either a tub (Shadow Cruiser and Coachmen 192) or a hard-sided door on a triangular shower (the Apex).  None have ducted a/c - not available on a camper this small.  All have outdoor showers, which we use a lot in FL.  All have microwaves and decent storage (for the size).
I don't like the T.V. next to the couch in a couple of them, but we've been told that a longer swing arm can be installed, so that it can swing out further away from the wall.
We really like the Apex (construction and weight), but it's the most expensive of the three we're still considering, but not by much.  I guess you get what you pay for.  We may research further, and see if we can find it cheaper somewhere else.  I think the deal we were offered is pretty good, though (MSRP is around $26,000, and we were offered a deal for $17,300).