What I am looking for in a store-bought salsa is heat-and a good balance of peppers and tomato. I don't like the salsas that have too much tomato paste taste. This isn't ketchup we're eating.
Although there are some nice store-bought salsas out there I have just discovered one that is outstanding. It is "Habagallo" brand Hot Sauce. This is an wonderful salsa. The heat is provided by the habanero pepper but the salsa is a nice balance of flavors.
I have tasted many habanero-based salsas but they usually have too much of a vinegar taste. In addition to the habanero, this salsa has tomatoes, cilantro, garlic and Worcestershire sauce. I think the Worcestershire sauce contributes to this salsa having that marvelous "smokey" flavor of roasted peppers.
Of course, I like the "hot" version, but a medium is also available. There is even an extra hot for when you are willing to throw caution to the wind. I lucked out and got to taste their green sauce which should be on the market soon. It was outstanding.
These sauces are available in the Texas at HEB and Kroger grocery stores. I strongly recommend you try a bottle. The company is located in McAllen, Texas, and they have their own web site at www.habagallo.com.