I'm very pleased with my current Quark light, the Mini123 S2 (seemingly brighter than even my 200lm lights, the thing is amazing), and am salivating over the Turbo X. The only thing holding me back is that while I like the twisty head part of the UI, I don't like that I have to go through a dark ritual to access the modes that aren't set. Are there any lights comparable to the Turbo X but with a different UI?
Honestly, the Turbo X is my least used light. It doesn't excel in any dimension. It's average brightness for an XM-L light of that size, too big to pocket, too small to take a 18650, mediocre UI, can't tail stand. It's not a bad light, it's just that there are so many better ones:
Thrunite Neutron 1A or 1C: much smaller, just as bright, tail stands, takes li-ion, easily fits in pocket.
ZebraLight SC600: smaller, brighter, tail stands, great UI, takes 18650. Borderline pocketable. Depends on the pocket.
Lumintop TD-15X: slightly bigger, but much brighter, tail stands, good UI, takes 1 or 2 x 18650.
If I had to part with any of my lights, all the Quarks (Turbo X and Mini X) would be first to go. They're OK, just not best of breed.