Cooks' Illustrated magazine (they also do the "America's Test Kitchen" TV show) has just rated pot and pan sets. The article is in the current issue, and it's probably on their website, as well. They rate several sets, but they recommend buying pots and pans separately, as sets often have some things you want, and some you don't.
I am an experienced home cook, and I wouldn't give up my cast iron pans for anything. They came down to me from my grandmother and my mother. I have a 5 quart dutch oven, a 12" chicken frying pan, and a 12" frying pan. They are my workhorses. I did buy a stainless steel saute pan (Farberware's "Millenium") that was recommended by Cook's Illustrated, and has been a very good value. I have some sauce pans that my mother handed down to me that I use every day, that are just the Revere Ware that they sell in the hardware store. Put these together with a pasta pot and some Pyrex baking pans, and you're good to go.