I don't like the PI anything anymore after having better bibs. I'd try anything by capo, castelli, sugoi, and assos. I like them for different reasons. You can search in bonktown.com for some good deals.

I started on PI shorts and refused to spend more than $60 on shorts/bibs before...then I was enlightened. I have the following and they're all $85 to $220.

Assos mille s5 - very comfortable (when I fit in them) for long distances, but I lost some weight and now they are too big and have gotten uncomfortable. I wish I didn't spend as much on these early on to riding. by far the most comfortable, but also the most expensive...although I don't like wearing them anymore due to the fitment. It's a large and am willing to sell them.

Castelli podium - heavily discounted premium bib. The fit is a little weird as the straps near the waist start toward the side. If you have a gut it will not be supported, but I like these a lot. No 'rubber' on the inside of the leg is nice. The material is lightweight and doesn't retain much moisture.

Castelli presto - great all-around cheaper bib. More color options, good for 3-4 hours. Nothing great, but nothing bad to say either. The cammy is thicker than most, but I don't mind.

Capo modena - very lightweight and great for hot days. The material is smooth, but the cammy is thin. It hasn't been a problem at all and I'm surprised with how comfortable this bib is considering how thin the cammy is.

Sugoi RS - these are my team's kit bibs. I spend a lot of time in these and I'm happy with them most of the time. The cammy is more similar to castelli in thickness, but appears to hold together a bit more over time. The material is nice and lightweight and doesn't hold on to much moisture.