Somehow I missed this post last night. But, I will suggest that a department store is your best bet, just for the sake of variety. Also, depending on when/where you go, you might be able to get a fitting, which REALLY helps. Also, going during a low-traffic time also cuts down the stress level.

I'm a big fan of Maidenform, personally, and Warner's more now that I'm a newly minted d-cup. And, believe it or not, Wonderbra actually makes the best strapless bras I've found so far (in case you're in the market for one).