While I agree that all-clad is fine cookware and have owned it, I can't and won't pay the prices. I can't and don't believe that the performance of All-Clad and Calphalon One is enough to justify the extreme cost. Go to a resturant supply store and look at their prices.
I too have a mix of brands...Loge cast iron, cuisinart chef's classic (sauce pans, stock pots), and claphalon tri-ply (non stick skillets).
My decisions were based on cooks Illustrated recommendations, a wonderful write up on cookware over at Egullet.com, friends in the food business, and just buyin'/tryin'.
Please dont flame me for being the only All-CLad dissenter in this forum. Its very good cookware but I don't think the price is justified.