I'm around the same weight as you and have been very happy with the King Platform Bed Frame with Storage 14 Inch Metal Beds Frames No Box Spring Needed Heavy Duty Black which I bought a few months ago for my new house. I would like it better if the cross bars were thicker and actually attached to the bed but it doesn't seem to be an issue so far. My only complaint is that the mattress tends to shift side to side easily but it is easy enough to just push it back.