I have the Corbin. I like it, but it's LOWER, so you'll loose leg room. Not bad if you are short, sucks if you are over 5'10"
Wife has the OEM GEL. She hates the shape of my Corbin and how hard it is. She isn't crazy about the Gel, but it's better than the stocker and better than my corbin according to her. I don't like the GEL seat because it's the same 'shape' as the stocker, so it puts too much pressure on my thighs on the sharp edges of the seat (where it transitions from 'seat' to side of seat.)
I HIGHLY suggest you try to find people who have the various seats in your area and try to cop a seat swap for a short ride. You may love one, you may hate one.