Charleville, if the Bosch is still ok (chuck doesn't wobble, motor ok, etc) then have you thought about getting the battery re-packed? I have had a couple done for my F-I-L and they work quite well. From memory it is $49 for cheapie cells, $76 for decent cells and over $100 for Pro battery cells. The co. is akkupak and have given me good service. Found the site again:
Akkupak | Battery Repacking
However, if you don't have a good battery charger than I would be leery of going down that path as the battery will fail again the same way after time. I use a hobby charger to charge up my FIL's drills now.
Waikune, the LTX is the $600+ model. 2.0kg, 2.6Ah, 96Nm. Fabulous specs (and a price to match). Looks like a great drill and fairly priced.