If you are going to get a cordless tool, Ryobi is a great buy, they have many options, car charger is my favorite. Replacement batteries are really cheap and can be repaired. I have 6 of their 18V drills, that my drivers use. Harbor Freight has great buys on sockets, wrenches, and corded tools, do not get cordless from Harbor Freight. I have many corded tools from them though, for intermitent uses. For everyday use get Craftsman, like screwdrivers and others. Heavy use tools, go for name brands Milwaukee, Dewalt, and Makita.
Air tools are my favorite!!! They will last forever, I have air circular saws, chainsaws, and routers. A good air compressor and you are ready to rock!!!
When pricing tools try Toolbarn.com and Tylertool.com also.