Thought it might be worth posting my experience with the 18V Makita 8391 combi drill currently available with two 1.3 AH NiCads and a good collection of accessories in a nice solid plastic case for ~ £120. The whole set is quite heavy, only slightly lighter than my old Ryobi drill driver plus angle drill with two batteries and fast charger.
As others have said, a nicely balanced and finished drill with a very good chuck. Enough torque for all I needed today, but the hammer drill setting gives rather less "hammer" than my somewhat larger mains drill. I'd use that if I needed to drill a lot of masonry, but it coped, if a bit slowly, for a few holes to support battens on some brickwork at the bottom of the garden. Probably would not want to use it for anything greater than 6 mm (except on light-weight blocks, which would be fine up to 10 mm).
Did two jobs this afternoon, put a dog guard in the van (using centre punch, metal drill, nut drivers) and put up some feather edge fence (masonry drills, wood drills, torx bit for masonry screws and PZ2 and PZ3 for wood screws). All of these conveniently stored in the lid, saved me having to collect them up from about three different toolboxes.
Although the batteries have limited capacity, they recharge in about 20 minutes so unless the drill was getting really intensive use you are not likely to "run out". Another nice point is that the charger will do both NiCad and NiMH, which gives you more options if you do need extra packs or need to re-cell them in a couple of years time.