Performance store
Check performance for sales, their house brands our pretty good. I really like the performance Ultra bibs, but the elites are good too. They often have sales where you can get 2 pair for under $100
Nashbar
Nashbar also has some good sales but I have not tried their house brand.
I currently have Performance Ultra bibs, Bellwether Elite8 bibs, and Bergamo Bibs. I would recommend all 3 as they work great for me. However everyone is different so what works for me may not work for you