+1. There's so many different recumbent seats that it's hard to give specific advice.

FWIW: I've had a Lightning with a mesh seat and a Tour Easy and Gold Rush with padded rigid seats. I haven't had an acne problem with either, but the TE/GRR seat leaves me with an itchy area in the small of my back. Not a big issue- it's just a little more sensitive when I shower afterwards.