Sidi for me as well. Each pair has (so far) lasted an average of 8 years hard use, compared to 1 or 2 years each for the "lesser" brands I've used.
Currently have a three year old pair of Dragons (MTB) and five year old Energy (road) shoes for the summer and a two year old pair of Diablo boots for snug toed happiness during the winter. I do not anticipate buying another pair for a few years yet.