I've *heard* (I could be wrong) that for an adult, the ratings are a bit different...since you're bigger and probably need more support than a smaller child, you should probably get stiffer boots than the rating...
My boots are rated for doubles and triples (they're actually the same ones that Liza T wears). Of course I don't do anything close to that but I think they fit perfectly. I like how they're stiff because my feet and ankles don't move around in there unless I want to, and on bad landings they don't twist or wobble at all. Even after skating for many hours my feet aren't sore the way they used to be when I had cheap Jackson Mystique(?) skates (they were $50 or so). My boots didn't take very long to break in (unlike the Risport RF1 I tried before which hurt a LOT). The person who sold them to me said they had some new technology where the foam inside the boot molds better to your feet and a lot of figure skaters who used to need custom boots were getting those instead. But he was also trying to sell me boots so take it with a grain of salt