Dadonator? Is that actually a brand? You want one that says it leaves a flat bottom. I think most of the better new sets will do that but a lot of the older and cheap ones don't and leave something referred to as "bat ears". These are visible when you make dadoes for shelves and don't cover over the dado at the front edge. There are some pictures of bat ears in this link: https://www.google.ca/search?q=bat+...sAQIJw&biw=1920&bih=971#imgrc=xf9tpVzPgmB39M:
Also do not buy a wobble type dado head. You would regret it every time you used it. There are several other factors to decide on too. The cheaper sets have 12 tooth side cutters. More expensive sets had 24 tooth cutters. The 24 tooth ones will/should cut a little smoother. The other main issue is size. Most common are 6 and 8" sets. With a 1.5hp saw you should probably stick with the 6" as it requires less power. I've never used more than 1" of the dado anyway so depth is not likely to be an issue.
I've heard good things about Oshlun but have no personal experience with them. One issue with most manufacturers is the quality level of any particular line. CMT for example has 5 different quality levels for their regular blades. Make sure you know which quality level you are buying. If you plan on doing a lot of finger/box joints for example then you probably want a pretty good one.
Also do not buy a wobble type dado head. You would regret it every time you used it. There are several other factors to decide on too. The cheaper sets have 12 tooth side cutters. More expensive sets had 24 tooth cutters. The 24 tooth ones will/should cut a little smoother. The other main issue is size. Most common are 6 and 8" sets. With a 1.5hp saw you should probably stick with the 6" as it requires less power. I've never used more than 1" of the dado anyway so depth is not likely to be an issue.
I've heard good things about Oshlun but have no personal experience with them. One issue with most manufacturers is the quality level of any particular line. CMT for example has 5 different quality levels for their regular blades. Make sure you know which quality level you are buying. If you plan on doing a lot of finger/box joints for example then you probably want a pretty good one.