Few things i'd like to say.
Rotary buffers shouldn't be used by amateurs. They have a much greater chance of paint burn-through and causing more swirls than taking them out.
Now with the drill buffer, drills go much much faster than a good rotary will. Plus, rotaries are balanced a bit better and aren't as top heavy. More chance with the drill-buffer to grind the pad edge into the paint.
Dime-store orbitals are decent, but lack the power and heft to be 'professional'. I have one, but it still takes a lot of hand work to get the gloss one strives for.
ferb!