Thanks for all the feedback so far. I still haven't made up my mind.

Dennis, I normally agree with the full fly, but as I get older I'm getting tired of crawling in and out of the tent. The optional fly is not full coverage, but it does appear to provide protection for the top and side seams and enough coverage to leave the windows partially unzipped. It also doesn't look like it would be too hard to just throw a tarp over and stake it out so there's an air gap for ventilation.

Size and weight isn't a concern since on a heavy camping trip I'd be loading this onto a utility trailer.