In the latest Cooks Illustrated, they tested and rated Balsamic Vinegars. The highest rated was the Whole Foods Brand (365) Balsamic Vinegar of Modena (the article stated that all vinegars will state they are from Modena).
I bought some and used it tonight in some pasta, and it was EXCELLENT !!! I think the price was $3.79 (here in DC).
I thought I would let everyone know...considering someone usually posts periodically looking for recommendations.