Dude, that question is kinda illegitamate.. what you want to do is try on a bunch of different boots in the same size...
So.. if you look on a chart, and you are a 27.5 mondopoint, you want to try on a bunch of different boots with that size...
In my opinion, the krypton rampages AND pros are both for people with reletively low volume feet.. where they have somewhat short feet and narrow toe shafts (the part where all the toes attach to on your foot)
if you have feet with large heels, you probably want to look at something like technicas or dolamites, if you have small heels and fat flintstone toes, then go for nordicas...
its all about feeling them out dude... dont just go for boots because you like the brand, buy them because that brand fits right...