I'm not a huge fan of DeWalt. For power tools I prefer Makita and Hitachi. Bosch seems to be good, but I don't have as much experience with them. I do have a cheapie Skil recip saw made by Bosch that has held up really well.
DeWalt is still part of the Black & Decker family, and sometimes you get Black & Decker "quality" with that. One upside is that the Dewaltservicenet.com website makes it easy to order non-warrantied parts (if they aren't on back order, which is frequent), but if you want warranty work done you will probably have to go to a DeWalt Service Center.
Ryobi, Ridgid, and Milwaukee are all owned and manufactured by TTI. Ryobi and Ridgid are lower end, but Ridgid does have an excellent lifetime warranty if you register for it. If you register for it, they will replace your broken tools, chargers, and dead batteries all day. Make sure to have your LSA (lifetime service agreement) number written down somewhere, that is how they track everything. If a tool breaks and is no longer made, they will upgrade you to the new model. Usually the replacement tools come with new batteries, a new charger, and everything else you would get with the tool at the store, but sometimes you just get the tool with no accessories.
While Milwaukee is made by TTI, they seem to have a greater focus on quality and their manufacturing, parts distribution, and customer support are separate from Ryobi/Ridgid. However, unlike Ridgid you are much less likely to just get a new tool or battery under warranty.