I've pretty much changed over to Makita for everything, including my cordless tools. I have the Makita 18v Litium Ion system. The batteries hold a charge for years, and they charge up in about 15 minutes. They are compact and easy to carry on my tool belt.
The impact driver will drive a 3 inch screw as far as the tip will reach into the wood. I don't think there's a limit to how far it will go in. It's half the size of the drill, with three times the power. What is really amazing is the impact action doesn't put any pressure on your wrist. My drill will hurt me if I try to hold on to it, and it only has 450 lbs of torque. The impact driver is over 1,400 lbs.
I've put in quite a few 1/2" x 5" lag bolts with it too without any effort at all.
It doesn't have a chuck, but instead you just snap in the six sided fittngs into it. I have one with a 3/8" socket adapter, and use it to drive everything that I've come across. From 3/4 in nuts on carriage bolts to self tapping screws into metal roofs. It just keeps going.
Makita has a small LED light on the end of their tools. It's very handy in low light, and tight spaces. Just try working under a cabinet or in attic, and you'll really appreciate having a light!!!
Eddie