Sieg knows. I love Adams products but have started using Chemical Guys stuff as well.
One thing I agree with him on is the use of brushes as opposed to mitts. The reasoning being rinse-ability. The mitts tend to hold the junk in them - especially in the fine wool type.
One thing you didnt mention in your post that I really believe everyone should do is use the 2 bucket method. You'll have one bucket with soap water and another for rinse water. So hose the car down, wash a section, rinse in the rinse bucket, dip in wash bucket, repeat.......
Also I highly recommend grit guards in the bottom of the buckets to keep from dipping your brush back into the sand you just rinsed off it. Buckets and the guards are cheap - no reason to not have 2 of them.
To go one step further - purchase yourself a foam cannon. You put a bit of soap in the cannon, attach cannon to power washer, blast a thick foam over the whole car. This will rinse away most of the contaminants and leave your car foamy and make it that much easy to wash with your brush.
Its very easy to get carried away with blowing your wad on detailing junk
But if you have a zillion dollar paint job then you should by all means have a nice selection of protectants to get your paint nice.