Good products...really just depends how much you want to spend. I agree that the pinnacle shampoo is a little pricey.
Do you have some type of polisher? If not, I'd start with a polisher, maybe a porter cable and base your order around that. Add some type of polish on top of that order.
The...
The OEM bmw brake pads do dust a lot, but soap and water will clean them up just fine, other than on perhaps heavily baked on dust.
While a sealant or wax may help, I don't think the effort is worth it on some wheel styles.
I agree with the power finish, but if you're going to follow it up with WG FG or 106fa anyhow, might as well have something with a little more cut like SIP or WG TSR to begin with.
I feel mitts last a long while if you're careful and avoid very dirty underpanels with them.
For grout sponges, I find you have to be quite gentle in handling them so they don't fall apart.
I was using poorboys spray and wipe and as a lube and the clay would get quite dirty. After running out of the S&W though, I switched to a car wash soap and water mix and notice the clay would not get very dirty at all afterwards. Though the panels did get smooth.
How often would you add hydroseal to the mf?
I think I would overuse this product, not knowing if I'm applying product or just spreading around water.
And wouldn't a MF applicator pad make it a little easier?