I'm looking for some recommendations for open heel stiff paddle fins. I already have a set of Jets so please don't recommend them. So far, the closest thing I've liked has been a set of Cressi Rondines but I'd prefer something a bit stiffer and with either a post or pin style buckle attachment (for spring straps). Which ones made your legs ache when you first got them?
Edit: typo
Edit: typo