I went with a machined sheave they didn't offer the OverDrive weights when I got mine so I am of no help with that one. I don't know about the UTVCrap sheave I have never run it but the sheave I got from 2X with the whiterhino450 cut is well worth 200$.. The sheave alone got me from 36mph to 40mph.. I know 4mph ain't a lot but it really does make a difference.. I also recommend 12gram weights for the 450(stock is 14g) they help let it rev.
My ride: 2015 RZR S 900! Pearl Black
Tell all your good friends www.MAGOffroad.com Its where you want to be.. lol