Loved my Kingpin 6.3 at weights between 210 & 220 lbs. Was super comfy and performed great. Good room for 33" inseam & size 12 feet.
I have been waiting for a good replacement to come on the market, and the Astro 58 sounds promising. I'd love to hear some performance characteristics from someone who's in an Astro 58 and is my actual size & weight. One thing I've found about Riot boats is that having big legs/large rump frequently means I can't fit (for example, large Nitro).