Gotta go with the leather cooled seats they are great!
On an odd side note they have some practical uses. Last month while OMW to my sister's for the nephew's B'day I get a panicked call from her. Seems eveyone forgot to pick up a cake for the party and as they live out of town this was a HUGE problem. So I get drafted to pick-up a cake, not a normal cake mind you a freakin ICE CREAM cake and I'm driving in the Z w the top down and temps in the 90s. Picked up the cake, cranked the passenger seat to full blast and the cake made it for the 35 minute drive w no issues.
So yeah get the leather