Cellar XV is a great wine store. They stock a varied selection of fairly priced wines (and a good selection of the more expensive stuff if you feel you have to spend more). The great thing is that you don't need to spend a lot if you are looking for quality, drinkable wines.
Monica and her staff are well-versed in value wines and can always steer you to something interesting for $10-20.
I have taken their recommendations many times and have yet to be disappointed.
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