Firstly, IT MUST BE CORDLESS. I don't have space for an air compressor. Past year I've gotten into doing my own car work, can't stand the $500 brake or ball joint jobs anymore, so I've been slowly getting tools. One tool I would like to have, but not sure I need is an impact wrench. IMO, a breaker bar is cheaper, but the speed of an impact gun is hard to argue with. There are a lot of brands to choose from and this is mostly going to be a "what brand should I buy into?" topic. I'd like to get a brand that I'll also get other power tools in the future that use the same battery; I don't want to go and buy a Milwaukee impact gun and then proceed to buy Ryobi drills, saws, and fan and end up with a bunch of different batteries. So, how is Ryobi? What about Dewalt, Crafstman, Black & Decker? Or is Milwaukee the only real choice? I'm not a professional, just a DIY guy, not going to be using these power tools every day, maybe once every couple months. EDIT: No Snap-On. Could buy a Geo Metro with the price of a Snap On impact wrench.