I bought a pair of 390 boss and I weigh 200 and it feels good for me.
On a side note, I am not sure if it is my bindings or if it's a typical occurrence but my rachet on one of my bindings won't lock down. Now the day that it happened it was super cold like 10F n someone told me that it might be the spring freezing, which is why it didn't lock. Is that usually the case? Or is there something wrong with the rachet? I rode two times after that day and it "seems" to not have that problem. I also crimped the top rivet on the rachet, which might have fixed it