My only pair is a pair of hammer bibs. My ass will hurt past three hours or so, and then I am really suffering for the rest of my ride. I also have a lot of trouble keeping my boys in place while I ride. I'd say if you ride more than 45 miles at a time, spring for a better bib.

I don't have any experience with other brands of bibs, but I think the chamois in mine is larger than it should be yet very weak and soft.