if you are looking for a drill to use on your bench, i would strongly suggest a corded drill. you don't have to worry about charging the batteries or the inevitable replacement down the road, which will run you about $50-75/pack. cordless drills are also bulkier and heavier, and you know we are all about weight!!!
that said, i bought a dewalt, 3-speed, 14.4v three years ago and like it very much. at the time it was the strongest 14.4v on the market. it was stronger than most of the 18v. the 3-speed tranny is nice bc it allows you to tailor your speed to your needs. the trigger is also very nice. on the down side, the batteries did not last any length of time. i had them rebuilt and all is well.
i am also impressed with the milwaukee tools. my brothers owns lots of them and every one of them has given great service, including his 14.4 drill.
i would definitely go with the Li batteries and read up on how to make the batteries last.