For me, Jabo's has still the best performance (excepting xengine and 1964 ogl, but that will only give you a lot lower graphics quality!). The others are all slower (excepting glide64 if you have a VooDoo card). It think Rice's plugin might pass in the future the speed of Jabo's, but at this moment I generally recommend Jabo's 1.40 and 1.5.