My first post here too. I just bought a pair of Track 325's. I've only tried them out on the carpet with a board so far, but they seem very nice. They may be a bit softer than my old Burton Reactor boots, but I'm pretty sure they'll be fine for what I need. I weigh about 190-200 lbs and they give some decent resistance, so from my point of view the 325 should be a perfect aggressive boot for your weight. Disclaimer though, I haven't tested the 700 or 225 series at all, so I have no idea what the differences are. Looking at it now, I may have chosen the 700 instead for the additional stiffness, but I'm thinking the 325 should work out ok. It's a very comfortable boot, and if you order them be sure to size down and not up!