Quattros or Apollo Biofin Pro. These fins are available with large footpockets. Both types, although radically different, produce lots of thrust which is essential in current. The most bang for the effort would be the Biofin. Watch the Forcefin crowd. They are trying to overwhelm any discussions of swim fins on SB. Most tests of the Forcefin, including the doctored Navy test, show mediocre results. One exception is the Excellerator testing done by the Europeans which showed very good results. Scubalab does not like the Forcefin as far as I can tell. The owner of the FF company sued Rodales which ought to tell you something. Evans is missing a bet if he hasn't applied for tax-exempt status under the freedom of religion clause. I mean, donating fins to all those groups like Cousteau's foundation and so forth must eat into the bottom line. Of course, there is an advertising bonus in there somewhere. Wait, I think we just saw that on the prior page.