I've JUST bought one!! In screwfix yesterday and saw this neat little hitachi 18v combi drill (drill/hammer drill) with 2 li-ion batteries and a 60 min charge, with a case for £99 ;( £100 off usual price)D. Saw the de walt ones and the bish bash ones but both only had 1 battery. Its a luverrly drill to use, and the hammer function makes lots of jobs so much easier than with a corded drill. My small de-walt drill driver is 12v and does lack a bit of punch, and one of the 2 ni-cad batts had died, so I had 2 de-walt drills and 1 battery, but managed to 'spike' the dead one with a car battery, and it now takes a charge, and works again. Depending on how much you'll use it considder the cost of a second battery on top of the price (not cheap) and compare it with a twin battery pack price. I use mine every day, as I 'do up' properties that I buy in a sorry state, so they get a hard life, my first de-walt 12v is now 7 years old and has a wobbly chuck, but still able to put up ceilings with it.
ps sorry just read op's last post , ie he's got one now, doh!!