Try and give it a good vinegar soak first before replacing it. Sometimes a little bit of Ca will build up on the impeller magnet, and rub on the pump. If you give that a good clean it may go away... However if that doesn't cure it, then replacement is the only option.

As far as skimmer pumps go, it is very hard to beat a Sicce 2500 with pinwheel. What size is your skimmer body?