[spxxx]

I'm 6ft 175lbs and have run the following seats:

Sparco:

Circuit 2: One the best fitting of the seats I've run if you're okay with a halo, fits pretty tight and has similar bolster support to the Evo.

Evo S: Slightly tight but had a great balance of bolster support & comfort if you're driving on the street at all. I think a standard Evo would be perfect.

QRT-R: Pretty similar to the Evo but the bolster side support isn't as tall as I'd like.... Only noticed this after sitting in a Pro2000 (plan on switching to the Pro2000 soon).

Grid - lower bolsters but solid shoulder support. It's way too wide for my waist though (I run it as a passenger seat to accommodate bigger folks). Seems like a great option for anyone a bit more hefty than me. (36+ waist)