fangster...I was curious about the SAME things you are. I talked to alot of people and looked at alot of coating products...and they are all slightly different (the people and the coatings
I finally decided on the CarPro CQuartz UK route. I talked to Corey at CarPro (he's very helpful), and it's all pretty simple. Corey recently posted a video showing just how easy the application/removal is. Like myself, I think people are so afraid of doing it wrong...that they do it wrong. Sounds strange, but after watching the video, I realized that I would have made it much harder than it really is.
http://www.youtube.com/watch?v=9rAM78oDffM
As has been mentioned, getting a swirl-free finish prior to the coating is important. From that point on is where the coating shines (literally). It won't lose gloss over time like sealants can (even though the sealant protection is still there). Just wash the coating as you usually would (preferably with the product-matched wash...Reset in the CQuartz case), and it's back to looking like Day 1 again.
Over the winter, the coating will take the brunt of any minor marring. Or if you are a total perfectionist and use a Cali-duster every day...the coating is taking that minor-abuse and not the actual clearcoat. If you are like me, in the spring, it can be re-polished (which will remove the coating) and reapply the coating for another full year of use. I will do it this way so they vehicle looks it's best at all times. Per the design of the coating, you could just keep going another year or more, but marring will inevitably build up over time. I prefer to run a yearly-cycle starting in the spring and going through the hard winter. But that's just me, and most would say that's a waste of money.
Don't know if that helps or not, but I decided to give it a shot.