Assos are nice.... kinda pricey but worth it if you find a deal..... I bought a pair of F1.Uno for 124.99... just keep looking for deals.
Another great bib is Santini Fluid Twist Gel... very comfortable but expensive.......
OP, you say you are on a budget so maybe you should try Giordana Silverline bibs.... or Colorado Cyclist bibs.... I own both and the colorado cyclist bibs have a cheap lycra but have an EXCELLENT chamois.... made by the same company that makes Assos.
http://www.bikesomewhere.com/bikesom.../262/1853/9368
http://www.coloradocyclist.com/commo...61,27340,30882