I have a PM2000 10" table saw. I need a dado blade. I guess the first question is stacked or adjustable?? I see dado sets run anywhere from just under $100 to well over $400. What performance variables are there given a $300 spread??? I don't have a problem spending the money, what I don't want to do is spend on something that is not really going to do anything for me...I need all the help I can get as it is!!!Thanks in advance for any info.