I've had the black and yellow alumninum stanley, and the lee valley rafter square. My current square is a $15 steel square that I bought at home hardware(benchmark?). Its got all the markings, and was square off the shelf. I doubt if you will find a square with all the markings and has all the marking surfaces at 16ths. I usually keep 2 squares when doing layout, mostly because I use them as my winding sticks. Sometime I might opt for one of the new ones with only 16th's and no tables because I will have the tables on the other one.
