The Silverline is a good polisher as far as i can see. It does everything perfectly - not sure what more i could ask for. Just make sure you get a decent backing plate for it ie. one of the ones for about £15-£20 rather than £3. It will make a world of difference.
I'm very glad i got a machine polisher, and i managed to remove a good amount of swirls from my car, with very hard paint. I'm not confident enough to go for a wool pad which will ensure complete removal, even though i'm sure it'll be fine.
For a car with softer paint than German cars, a compounding pad, a polishing pad and a finishing pad plus Gtechniq P1 will see your car looking better than it did before it left the factory.
TOP TIP: Do polishing in a garage. I did it in the open near 3 large trees and it was very annoying.