I agree the 17" depth is kind of weird. Good luck with whatever you decide.
You are all correct. It is quite easy to transport and set up a larger kit, and smaller kits are also loud.
It must be my hearing, but I just like the sound of smaller shells. When I sit behind a mega-kit that's not mine, I tend to play around more at the smaller end of the rack, and I respond well to 13" and 12" snares, that stand out clearly amongst basses, and electric guitars. And I like a little melody from the bass drum at human hearing range also, and 12" to 14" is the right bass drum shell depth for me. I guess I may be the perfect candidate for a mini-kit.
I am about to take the Stage Custom to a studio this morning, to see what I can bring out with various tunings.