I bought the 5' snow edge before last season, and it worked well. The edge is very thick and held up well on smooth pavement, though I used it briefly on a tar / chip surface which really roughed up the edge. It should do fine on pavers. What I do like is that it is very well made and securely mounts, so I was able to use the loader to move piles of snow without taking the edge off. When I bought mine the replacement edges were only $60, so I bought a spare. That's pretty cheap for an edge.
My bucket last year was 5'-6" so the 5' snow edge was fine. This season I will be using a 6' bucket so I'm not sure I will like leaving 6" on each side not scraping pavement. It might be nice letting the raised 6" bucket hang over driveway edges though... We'll see.
Also, don't count on scraping packed snow down to clear pavement, especially when the edge gets inevitably rounded. I will flatten mine out on dry pavement when I get it out of the cargo box (soon).