I wasn't too keen on a black interior in a convertible but didn't have a choice with my LE. Even though we haven't gotten to the dog days of summer yet, I've been impressed with the Alcantara inserts in my seats on the hot days we've had. It seems cooler than leather. Maybe you could have some inserts sewn into your seats? Shouldn't be too expensive compared to other options and would look nice.
Just be ready when everyone wants to rub your seats.
