Hey congrats on the Metabo purchase, you'll enjoy it. The first time you use it you will notice the difference...well that is if you have used other rotary's. I love how the Metabo feels in my hands, so confortable...no pressure points...oh and no vibration YYYYAAAAAAYYYYY!!!
Okay the pads, I agree with orngez. Just get your self the addaptor for the rotary and your set. I got some Lake Country pads and I just purchased the rotary backing plate (the appropriate size too) and I use them on the rotary too. I'm going to try and get a buch of the old style of Lake Country pads before they are gone...cant have enough pads.