I'm glad to see this topic. I am larger and have had problems finding a sports bra that does not have cotton. My favorite is the Patagonia, it has the least uniboob look and wicks great. They were on clearance at www.altrec.com and sierra trading post. worth checking out!
Another good resource for us is Title 9 Sports-they have a great selection of sports bra's, it is women run and owned and the customer service is great. Even if you don't buy from them (kinda expensive).
Great discussion, I like hearing other women's opinion and experience on this! I'll try out the sugoi next.