Okay, I did 8.5 in the Zoots today, pretty hot day for as much as I'm acclimated this early in the year - 86°F, 67% humidity.
They didn't ride up, didn't bunch up in the crotch or give me any discomfort there. I would say the rise is a little bit higher than I'd like, but they come just below my natural waist where my belt rides that I carry my phone etc. in, so as long as they aren't above that line I'm okay with it.
They breathe reasonably well. They didn't get sloshy-sweaty the way some shorts can get (yuk). I didn't notice them being super hot in the sun.
As far as the thigh compression ... I'm skeptical about the benefits of compression for shorter runs, but I will say that I noticed the muscle support on steeper hills. I'm not sure that's a good thing, really, since it kind of encouraged me to keep on overusing my quads. I'm pretty sure the tighter band is what kept the shorts from riding up, but when I really want compression for the benefits of compression, I'll stick with my CW-X shorts that have support for the lower abs and glutes too.
I didn't use the pocket, very rarely do, so I can't comment on that.
Overall - I like them. They'll go at or near the top of the stack, at least when I'm planning to run under three hours. 
As far as the PI shorts with their Coldblack fabric, I haven't worn them yet, but I figured an objective temperature test is the best. While they were on the clothesline this morning in full sun I stuck a probe thermometer inside the shorts, up against the fabric, on these and several other pairs of shorts. Short answer - don't spend extra for Coldblack fabric.
The overstock price at DepartmentofGoods.com isn't too far out of line for "regular" shorts, so if they work well otherwise I won't be disappointed, but both these pairs were within a couple of degrees, and the main difference seemed to be between shiny black shorts (hotter in the sun) and looser matte finish knits (5-10° cooler in the sun, though possibly not as good for wicking sweat).
Both pairs dried super fast. In fact, I was planning on running in a different pair of shorts this morning, but when these two were already dry by the time I got my act together, I figured I'd try the Zoot shorts, and leave the PI's on the line so I could do a temperature test after my other shorts dried.
Speed comes from what you put behind you. - Judi Ketteler