Each type of pan has its place in the kitchen.
I use stainless steel All-Clad saucepans, stockpots and frying pans for everyday stuff. They are pretty much indestructible - even fine under the broiler and in the dishwasher. They are heavy. They cost a fortune, but are built to outlast you (as evident by the lifetime warranty). I have three All-Clad non-stick pans. Wouldn't buy them again as all non-stick surfaces degrade over time. Even though All-Clad has a lifetime warranty (my non-stick omelet pan has been replace twice by All-Clad), I still wouldn't buy the non-stick. Just easier to buy a Circulon or Anolon pan for a fraction of the price and get a new one when the surface degrades.
I have three Le Creuset's ranging from about 2 quarts to 7 1/2 quarts and they get a lot of use. These dutch ovens shine in the oven (obviously) and I realize not all HK kitchens have ovens. As a stovetop-exclusive cooking vessel, it seems a bit underutilized and overpriced. Wife likes to make no-knead bread with the Le Crueset. http://www.nytimes.com/2006/11/08/di...mrex.html?_r=1 Try it. It's life-changing. N.B. You need to buy the stainless steel knob as the original plastic knob is only safe to 190C. It seems a bit outrageous to have to spend about $100HK on a knob after spending a small fortune on a fancy pot, but that's how it goes.
With the wok, I went with the cast iron as it seasons better than carbon steel and stainless (which doesn't season at all). Downside is that the cast iron wok has two loop handles on either side rather than a handle with a wooden extension.
Keep in mind you should be careful with the utensils you use with nonstick, cast iron and enameled cast iron. Metal can damage the surface.