As with any chamois, everyone has different views on their relative comfort. A couple of years ago I tried some Gore Bike Wear knickers (not bibs) and the chamois was terrible for me, which I mentioned in this forum. I currently have a pair of Assos bib-knickers but since I moved to DC I have not used them much -- I go from shorts and knee warmers to long tights. Somehow, in the Chicago area, I found the knickers more versatile.

Assos has some knickers (not bibs), as do Giro and Giordana. Check Competitive Cyclist. I am currently on a Ten Speed Hero "binge", having been at the point of needing to renew my stock of shorts. They have bib knickers -- I love their bib shorts. The chamois is on the thin side, the fabrics have some heft to them. . I always use a base layer, so removing the jersey (always full zip) does not bother me as much.

Re Rapha, one of my team mates is not pleased with the fit and chamois. I was considering ordering from them for a while, but then I found TSH (plus the photography in the TSH site is very nice... the owners are all designers or photographers in Chicago. And they sponsor a couple of female cyclists.