I now have three woks. The third one cost me U.S. $80 but is well worth it because it makes the wok usable - the Calphalon 13" multiply.

It's got a flat spot in the center just big enough for stability so it sits right down on the flame and there's no heat blocking ring stand. The flat spot is small enough it doesn't interfere with normal wok function.

Heat in the high conductivity aluminum layer spreads out very effectively to keep heat even across the bottom and up the sides. 13 inches is just a tad small but not so much as to be a serious problem. It cleans easily and there's no chance of getting an iron flavor in acidic foods.

It doesn't come with a lid and a lid is very important, particularly one that's high enough to fit over steamers and such. Fortunately I found a 32 cm stainless wok lid that fits with absolute perfection at the Asian Supermarket.