Edit: I have not tried blitz, so I cannot comment
You really have not many choices, but ALL of the durable carnaubas are really good ones:
Rating based on durability alone
1) Collinite 476S superdouble coat: Easy the longest lasting carnauba, period. Many sealants will have a heart attack trying to run neck and neck with it. 5-7 months.
2) Collinite 845 insulator wax: Also as tough as a 25 cents steak, but the 476 lasts longer. 4 - 6 months.
3) Meguiars #16: Lasted 50 years unchanged for a reason. 3-5 months
Looks:
Tie 1): Collinite 845 and #16. The 845 is very glossy and shiny, #16 is deeper. These 2 can easily fit the bill as beauty waxes.
2) The 476S is not bad looking at all, but there are quite a few awesome looking products ahead of it. I have used 476s for looks alone and no reason to feel ashamed.
Application:
1) Easy runaway, Collinite #845. As easy as S100 to apply/remove
2) #16. Trick is to apply it THIN.
3) 476S. Trick is to apply it THIN. Apply it thick and you better have strong arms or use a PC. If applied thin thin you can even let it sit overnight and remove it without too much effort. I have done it before as experiment.
Personally, I like the 845 so much that if I had a choice of one, and only one LSP, either sealant or carnauba, any brand I would pick the 845. In my opinion is the best all around LSP as it very durable, looks quite close to S100 if you ask me, and application is very easy. Not to mention the price and the fact that 2 drops can cover a panel, so yield is high. It also seems the most resistant to heat, as one of its hallmark applications is on the wheels and it surely performs. As very minor downsides the smell is chemical (neutral) and you need a CLEAN surface for proper bonding, but that is a given. Check my review for it.
My mother-in law van got 476S for a winter in michigan applied thanksgiving. Very seldom tunnel car washes, so in some cases the slat stayed on the paint for a few weeks. By the end of March it was still beading quite nicely.....
The durability I gave for them is obviously YMMV, it depends on wheather, washes and how clean the surface was. I made the mistake to apply 476S to a not very clean surface and to my surprise 2 weeks later the famous beads-that-won't-die were gone......
Alex
and she's not hypocritical. 
