[ctt956]

I haven't used DeWalt or Milwaukee cordless tools(yet), but I have used some Black and Decker, who owns DeWalt. The only difference between Black and Decker and DeWalt 20V batteries is that the connectors have different amounts of plastic; just enough to make them incompatible. I have had good experiences with Black and Decker tools, so DeWalt should be good as well, since it seems more geared towards professional use. Milwaukee tools are made by Techtronic Industries, who also manufactures tools for Ryobi. I think it really depends on your needs and use of these tools. Ryobi is designed more for occasional light duty use, while Milwaukee and DeWalt are more contractor-grade. I know Makita is also popular with contractors, and they seem to be good tools. We(900) use Makita 18V LXT. They feel solid and well-made. Both Makita and Milwaukee have a wide variety of tools with interchangeable batteries, with Makita having more specialty tools. Just see what you need now and what you think you'll need in the future, and which brand has more of it.