Niteman - I'm at same weight range as you. I took the Giant one apart, as I'm sure you have, and those cone shaped surfaces look like it would hold until you hit a big bump and then leave you sitting on the top tube or the back tire! The Cane Creek post is rated for 330 pounds. The precision of the seat angle is very important and if you tilt it downhill it will make your hands get tired from holding the weight back because of sliding forward on the saddle. I adjust my seat with a level. I want a post that will allow me to set that level precisely and keep it there.