weenerdogg:I have decided that i am going with open heels. What I have read it really depends on how you kick to decide what kind of fins you need HOWEVER I have never dove before so I have no idea how I kick. Jeez. i did read the split vs non split thread but am still not sure what works. I wish I could rent.
Every type of kick has to be learned, you can also easily learn several different kicks (which will most likely not be taught in your BOW class) to give you several to choose from based on the conditions of your dives. http://www.divetekadventures.com/Images.htm halfway down the page there is a section called "skills" and there are video clips of various finning techniques. Check out the Frog, Modified Frog, Modified Flutter, Helicopter turn, and Backwards kick. These were all done using paddle fins (Scubapro Jet fins) the other good thing about jets is that they are not expensive ($61 from Leisurepro.com) so they make a nice "first" pair of fins that will allow you to grow with them as long as you want. If you ever decide to get split fins in the future you can make that choice without being out of a lot of money for your first pair.
Have fun learning everything.
Aloha, Tim