After running the ST 2300 and the OS 160 there is a night and day. The OS running sloppy rich turns a 18X10 MAS like it is not even there, the ST 2300 on the 18X6 sounded like it was trying to get more. The ST 2300 rpms with the 18X6 was about 7800, I did not tach the OS but it sounded like it was swinging it a lot faster!!! Thanks everybody, my wife finally talked me into it. She said better more than enough than just right.