I am thinking about getting a pair of full foot fins to use in the pool and on warm water trips. I currently have Mares Raptor split fins and love them but they are heavy for travel and the boots take forever to dry. I have had three knee surgeries and have a tendency to get leg cramps. I tried Mares Quattro Excel last night in the pool but I had leg cramps and my knee hurts today. Does anyone have any recommendations on full foot fins? My LDS doesn't carry them so I can't try before I buy. Thanks!