I have been diving a dry suit over the last couple months and need negatively buoyant fins. I have the jet fin style fins from xDeep EX1 in medium stiffness as the only negative fins. The Eddys were too buoyant. I was looking at the RK3 HD, but was able to try Hollis F1 for two dives over the weekend. They were powerful and yet easy to do the different kicks especially when I'm used to the other fins. Does anyone have any experience with both and have any insight into why they chose one or the other or something I'm not considering? Thanks!