I've always preferred slower speeds with the rotary so I will normally be buffing in the 900 to 1200 RPM range. It does depend on the paint and what pad I'm using as well where I might go to 1500 RPM with a more aggressive pad if I need to do a lot of cutting and already feel comfortable with how the paint responds.
I don't use much Finish. Just Swirl with a Yellow, Orange, or White pad and Amigo with a White or Black pad. I find this combo works for just about everything!
Richard