XD Subcompact 9mm -- that was easy!
I've been loving my Crossbreed Super Tuck for my XD 40 4". I tried my XD 9 mm subcompact in there today, with the regular magazine, and it was even better. Less poky on my pudgy body. The holster is a little loose for the 9, but that's to be expected since it was designed for a 40. Crossbreed has great products, though I think i'm going to try the SmartCarry system as well with the 9. Maybe I'll just go to all subcompact models as my carry weapons.
I've found that the Supertuck is much easier to use than it first appears. I can put on my gun belt, then just clip the Supertuck right over it, tuck in my shirt and with minimal adjustment I'm good to go. Even with my girth, it works pretty well.