You forgot Metabo for drills that begin with the letter "M".
I agree with Jim completely. I have a little Hitachi 12v along with 15.5 and 18v Metabos. The Hitachi is the one I always seem to build things with, also the battery doesn't protrude forward which I find easier to maneuver.
But if you just want an answer to your question I personally prefer the Milwaukee. I had one of those for years and again I like it too because you can flip the battery around backwards which makes it easier to maneuver in some situations.