Celphalon. I love my set, and it must be good because #2 DS (who's really picky about how he spends his money and loves to cook) also bought himself a set.
I also have a set of 18-8 ply stainless steel. The pots create such a vaccum when the top is left on and the heat is turned on that it acts like a pressure cooker.
Also have my old faithful cast iron pans...a must for good chicken and pork chops ... brown them and top them with whatever you choose and stick the whole thing in the oven.