According to Architecture Lab they have rated Bosch, Dewalt, Milwaukee, Black & Decker, Makita, Hitachi and Ryobi as top rated cordless hand tools. In my vast experience as a manager at Savage design team,Also managing tool purchases at Everything Residential Hilti is the best corded and cordless power tools available and they are not even listed in this report. As a home builder, kitchen / bath remodeler and electrician my top three rated tools are Hilti, Dewalt and I will say when starting out on a budget Ryobi is a good choice. Its not the highest quality but dependable and affordable for beginners.
