I recently bought a Metabo 18V Li-Ion cordless hammer drill with 2 batteries & fan-cooled charger all in a plastic carry case for about AU$500. It has an 'impulse' mode for starting holes without center-punching, or for torquing screws without stripping the heads.
I am unsure of the reputation of Metabo tools, but it seems to be solid and well made.

Incidentally, why do drills always have the ventilation holes right where you put your other hand for extra 'push', thereby depriving the drill of ventilation when it is working hardest?