James, I know you directed these questions at Michael but I'd love to give my impressions as well. Ignore them if you don't want the input.
On my Super Red MR2 I especially like the look of three LSP's. UW liquid, #25 and M301. All darken the color and add a glow not seen in NXT or M21. I have several bottles of the latter that I use on lighter colors but the medium red just glows with the three aforementioned. When I would show my MR2, I'd have people standing in line asking what I use, as the glow was almost florescent. When I took it to my Toyota dealer for service there is always a crowd of onlookers. M21 and NXT are excellent at reflecting light but IMHO, the deep dark glow looks better on this color. This is just my personal opinion, of course.
As to M80/M83/M07. M80 is pretty oily and does negate somewhat the need for M07, yet the 07 seems to be absorbed by aging ss paint and may help to keep it alive longer so I used to use it regularly. I also would use it on top of my LSP just before a show where the oily nature of 07 made the paint look fresh and wet. After the show I'd QD and reapply my LSP. I never found that I needed M83 on this SS paint.
I find UC to be much more aggressive than M80 or #205. This ss paint is so soft that there is little need to use overly aggressive products to achieve stellar results, IMO.
If I'm mistaken on the aggressiveness level of UC here Mike will correct me but I seem to recall that UC was like a 10 on aggressiveness and M80 and M205 were around a 4. M105 is like a 12 on that scale. M205 and M80 are much more finishing polishes but this SS paint is so soft as to make it really effective at removing any marring.
I also might add that the foam pads I used were much less aggressive than I'd use on a CC paint. One of the things I loved with this paint is it's easy correction.