Force fins...but which ones???

[underthewater]

So I have looked at the pro force fins, tan delta force fins and the sd1's...Looking for some advice on which people thing are the most versatile etc. I do equal amounts of diving in tropical water as I do in cold pacific water (washington state/alaska) and am trying to plan a trip to russia to go ice diving ( keeping my fingers crossed on that one folks! ). Also would be used for rescue, photography, wreck penetration blah blah blah I would love to find a pair used and save some money if possible (size XXL) Any tips or advice??? Thanks