I've been an Oster user for years and years, mostly because that's what Mom always bought. I just bought the Andis AGR+ clippers, and I absolutely love them.
I got them because next year we're showing steers again, and for those of you who don't know, that involves A LOT of clipping. Everyone around here that's into showing cattle prefers Andis because they last longer and they run quieter. I just found out the quieter part is definitely true.