For sheer power, it's hard to beat a good pair of Jets, but you have to have the legs to move them. If you're having cramping issues, and hitting the gym is not an option to cure the root of the problem, a good pair of splits is probably a great option. I highly recommend the Apollo Bio-Fin XTs. They avoid a number of the usual complaints about splits with only a small compromise in increased effort.
If you can find a pair to borrow (lots of divers in LA, ya know), see what you think before you plop down a bunch of money.
If you can find a pair to borrow (lots of divers in LA, ya know), see what you think before you plop down a bunch of money.