your best off buying the megs G220 dual action polisher i use one for my detailing work
and have been for the past few years as for polish/wax/sealer its all down to professional choice meguiars #80/#83 are a good place to start with then build up your stuff with the likes of things from dodo juice poor boys zaino (but stay away from autoglym IMO its shit stuff)http://www.cleanyourcar.co.uk/