For a wax/sealant I would get Menzerna Power Lock. It looks and last much longer than Meguiar's. I wouldn't get #7 either.
For the polish, M205 finishes down quite nicely, if you have a darker colored car you can use Menzerna PO85RD after M205 to make the gloss and reflection that much better.
Personally, I like the flat pads more than the CSS ones.
All other questions are welcomed