Forgot to add this in are you looking for 16mm/17mm? Penelope sized or spheroid etc. Bagua 17mm rest 16mm also check out the merte by hc designs 17mm with airflow control regularly in stock as well
Thanks for the detailed response Coffin. I was looking at the Piccolo but it was only available in bead blasted finish, which makes it look like it's spray painted in matte gray - no my cup of tea. If GP had a polished or brushed finish units, I'd try it out, but that was the last batch as they're working on a new 14500 mod and don't know when it will be offered.
Of the ones I've seen, the Ba Gua looks the best, but I've also read about issues with the button. Temon I'm not crazy about, while the Precise Simplicity is much taller than the Korean mod, plus those grooves look like PITA if you want to keep it clean and polished.
I plan on using GP Spheroid, Penelope and the ET Vision (not bad for its price, may I add). I'd prefer a 16mm one, but I would look at 17mm too if it looks good.