This is a tough question to answer. All three are great tools, but the Dewalt and Bosch are a closer comparision, while the Hilti you stated is a bigger tool and prorably more expensive. Your not going to go wrong with any of the drills, but the Hilti might be over kill if your not using it everday. If it is between the Bosch and the Dewalt, I like the Bosch. I haven't used one in a while, but when I did, the Bosch seemed nicer, not as hard on my hands. Again this was about 8 years ago, so maybe the drills have changes, I am sure they have.