I can't comment on the quality of the pads, but that's pretty much the exact same set of polishes I keep as my go-to set (I'll use S30 rather than S40, but we're splitting hairs here). I also used to use a DAS6 when I first started, and it's a solid piece of kit. The Scholl stuff is highly recommended as it contains no fillers, so the finish you see once wiped clean is the finish you end up with.
That's about as good a kit as I've seen for sale. Add one of each of these pads to it, and you'll have a quality set able to tackle most things that a DA machine can.