I did it purely for the aesthetics. I wanted carbon seats and I wasn’t fond of the shape offered by RCR. They do have a carbon option now. The B5s feel comfortable enough for street use and I think they would be perfectly fine for track use as well. I’m a pretty small guy at 5’4” and the side bolster isn’t so obtrusive to make steering an issue. I plan to sit fairly close to the wheel so not hanging up my elbows and armpits is key.
In either case, unless you plan to get real fancy, you’re going to run a race harness no matter your primary use.