Bikejerseys.com has some nice deals on bibs and plain jerseys if people are interested.. He puts the chest and waist sizes right in the ad and have found them to be very accurate..
I havent tryed bibs yet.. i have a gut..a real gut! haha and i dont like the air spacing down there! lol i'm also a belt under the gut kinda guy... so i prefer shorts and have had good luck with Aerotech Designs when i was on my Tour.
Your body shape also determines what you like in shorts. My family comes from the "Glutaeus-Maximus" and "big-leg" side of the human evolution tree. Bibs tend to either fit me WAY TOO TIGHT in the upper-thigh to..."junk" sections; or if I buy them big enough for my butt and legs, the straps are so loose that they fall off my shoulders. I had one pair that fit my legs,but the stomach was so loose that I had to be careful when I bent over while standing (can you say "full exposure?")
I prefer bibs of any kind over shorts as it keeps the fun bits in place better my favs are a set of LG I have but they were around $150cdn.
Best thing about cycling is when I'm at work I'm thinking of cycling, when I'm cycling I'm thinking about cycling.