It's been about a year and a half since my original post. Just wanted to give an update. I've tried a few more waxes and sealants and I'm still a huge fan of Xtreme Solutions Poly Seal and Xtreme Solutions Topper. For a while I was using Griot's Garage Ceramic 3-in-1 Wax, which is also an outstanding product. I think the GG offers a bit more longevity in protection and durability over Poly Seal. But both products are so easy to use and reapply that I don't find durability to be as much of an issue. I prefer the user experience of Poly Seal - better scent and I like the fact that you can easily see the Poly Seal when you spray it. The GG 3-in-1 is completely clear and therefore harder to see exactly where it is on the paint.
Topper is, IMO, one of the best toppers on the market. You can top just about any wax, sealant, or coating with it. It is a great drying aid. Even though Topper is supposed to offer gloss and shine but not that much protection, I find it offers more protection than expected.
My routine is to apply Poly Seal once every 2-3 months. I then use Topper as a drying aid after each weekly wash. Here are some pics I took today after a wash and application of Topper. I didn't notice until after I took the pic that you can clearly see the reflection of the palm tree in the hood: