I have the 13 inch delta benchtop planer that works well. It is two speeds, 60 cuts per inch for dimensioning and 90 cuts per inch for finishing. We have a big delta at work that we use almost every day. If you are going to be planing dirty wood you might want to consider a machine that has a spiral cutterhead. They use replaceable carbide inserts that can be rotated before they need to be replaced. Each insert has 4 cutting edges on it. Those machines are quite a bit more expensive however, but are much quieter. Beware of buying an older commercial model, make sure it isn't 3 phase, unless you have 3 phase power available. The benchtops just use pressure and feed rollers while the industrial machines use a pressure bar and a chipbreaker to put downward pressure on the stock in addition to the feed rollers. That is why the industrial models are so much more expensive. They are also more complicated to set up. If you have to get the knives ground, you will also have to adjust the pressure bar and chipbreaker to eliminate snipe, which is another advantage to a replaceable insert cutterhead. With a benchtop version, you just replace the knives, there is no set-up required. I would buy the delta over the dewalt hands down, if you go that route.
