Personally I love my Tefal set (1 big, 1 small frying pan, saute pan & 3 sizes of saucepan); can't tell you what the range is, but it's whatever was about 6 or 7 years ago and it's fab! However, the non-stick on the big frying pan is just starting to come off a bit, but usually isn't a problem.
I have a Le Creuset set too (Large casserole, frying pan & 2 saucepans) but have to say, the only thing I use with regularity (which actually gets used at least once a week) is the casserole; the reason being that usually whatever has been cooked in this is served up with a ladel, whereas the other items usually require lifting and holding over the plate: it's a wrist breaker! I've not had any problems with chipping though. Aside from Le Creuset's ironware, I have a lot of their potterie range which I also adore.