im running wiseco right now but only because i traded top ends. i had just rebuilt my last top end with wsm platinum series and i was really impressed with the quality. cant say much for durability since i only had maybe 10 hours on them when i swapped. the rings wsm uses are extremely tough looking. they look to be a lot thicker than wiseco rings. my next rebuild will be with wsm pistons, not to mention they are about 50 bucks cheaper