Alright....

Time to retire the PI Ultrasensors. They've chaffed the living hell out of my crotch for long enough, and it's to the point of preventing me from sitting "properly" on the bike, leading to back pain from having to continually slide forward on the seat.

The contenders are:

Assos F1 Mille Shorts
Assos F1 Uno Bib Shorts
Castelli YPRO Shorts

If anyone has experience with both brands, and can compare the difference in chamois, that would be great. I don't know of any shops around here that have this stuff, so I'd have to order it. I'm currently broke at the moment and can't really afford it, but it's either stop riding or buy new shorts.