I dont know what the new Lithium stuff is like, but my firm usually buys Bosch, and we've had loads of drills pack up in one way or another (by loads, I mean every single 14/18volt one I have seen). The batteries dont seem to last very long, they are big and heavy, and they do, or at least they used to, have a problem with getting stuck on hammer. The last two drills that were supplied to our lads were Makita, and they seem ok so far. I have an 18volt Dewalt, which I have had for 5/6 years, and the drill is still perfectly ok, cant say the same about the batteries though, Dewalt batteries also seem to pack up fairly quickly.
If its just for occasional use, it will probably be ok, but if you are using it everday, I'd try and get some more reviews before buying.
Is this it?Bosch GSB 18VE2-LCP 18V Li-Ion Combi Drill - NoLinkingToThis, Where the Trade Buys
Seems very good value for a Lithium.