Milwaukee wins for me!
When I was in the market for a cordless hammer-drill/driver, I looked at both DeWalt and Milwaukee. One of the selling points on Milwaukee is that they use all metal gears where DeWalt has plastic.
I bought the Contractor bag with a 18v Hammer-drill/driver, sawzall with charger and bag. Later on I added the light. Just the other week I bought the new Milwaukee radio (great!).
True, the milwaukee drill is heavy, but the thing goes on almost all day, even on hammerdrill. I don't personally carry my drills in a holster anymore so the weight isn't as much of an issue. But overall, I'm very impressed with the quality and rugggedness of milwaukee, I won't buy anything else now.
Drill on!