I love Ann Taylor; I've bought my last 2 suits from them!
The biggest advantage is that they sell suiting separates, so you can fit your body, rather than having to buy what fits your largest part & having it tailored.
My suits are their "tropical weight wool" blend - very polished, and fairly easy to maintain.
As a bonus, if you get, say a pantsuit, you can re-purpose the trousers with a nice sweater or blouse & cardi or any number of other things for date-night - or as a base for your new work wardrobe!
My only caveat is that they can be spendy, but I really feel like it's worth the money.
For the tummy issue, I think the advice is to try pants with a higher rise or a higher-waisted pencil skirt with a structured jacket & shell. Oh and shaping undergarments.
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Liz
DD (3/2010)
"Make mistakes! Get messy!" - Miss Frizzle