So in the last three days, I have flown, with an instructor, a Cirrus SR20, a Diamond DA40, and a Cessna 172. All had the G1000 panels.
In the San Antonio area in September - hot and humid.
First, nice to realize that some mechanical skills come back without too much effort - can turn while holding altitude, other very basic flying things. It's been literally 30 years since I last did so.
Second, glass is great! The intricacies of using the panel is still in the future, but I'll be going to ground and refresher school for that, so no worries. But the ease of use/interpretation was much better than I imagined since I last used the round steam gauges for everything. Not having to have a paper explosion when crossing sectional boundaries, or when I get my instrument rating, having approach plate pages flop to the wrong one, etc. will be nice.
Third, and this is how I tried to explain it too my non-flying wife - the Cirrus with its performance, interior, and AIR CONDITIONING was like being in a really nice Mercedes or BMW. The side yoke also made it much more comfortable for a 6'4" guy for leg room. My instructor used a 8x11 iPad and had plenty of room to use it on his lap as a kneeboard. I want one of these. @500K and up new, of course.
The Diamond with it's stick and lots of plexiglass was new to me. Damned hot all day. Got queasy while skull down trying to read/play with the G1000 for some of the gee whiz stuff while bouncing around at 2500 ft. Not as roomy as the Cirrus or the Cessna especially for long legs. My instructor used an iPad Mini on a suction cup on the side window.
The Cessna was old home week. Like being in a 1968 VW Bug with the mother of all stereos for the G1000. Also hot, but less so than the Diamond since it was less plexiglass to heat up. The yoke coming back into the lap thing is making me reassess my plan of buying a full size iPad (cuz I'm old as are my eyes) and going with the Mini. Just ain't as much room in the thing now as when I weighed a whopping 160 back then.
Sticking with the David Clark's for now until I've tried multiple other headsets and decide to drop $1K or more
Bottom line: Air conditioning is great in a small plane. It should be considered a basic human right.
I am really grateful for all the inputs received here for recommendations and gouge.