In doing some of my research, I came across someone selling a 450 who told me that it smoked H16s. I find that hard to believe while doing the math; however, I'm no expert. I don't know how much good lines will make up for LOA and sailing area. I have also had some tell me that with my weight, the 460 would be perfect, while others tell me that I am way too heavy for it (155 solo/220 with crew). I'm still leaning towards a 500 since I am holding out on my wife crewing/helming when the kids get older (our combined weight would be around 260-270).