Couple thoughts, flashlight built in would be cool, I dont ever recall seeing one, hammer drill, dont bother if youre planning on running any holes in concrete over 1/4" diameter, its just not the tool for that job even though they make it.., I know from personal experience, thats what rotary hammers are for (and they do make the cordless models, batteries are a tad bigger and voltage is almost twice as high).
Something that would be really cool to have, and that Id love to see, you might consider looking for, a drill with a level built in, now there is something you can actaully use (assuming your not doing automotive work with it) As far as batteries, I like my Bosch's with Bluecore, but Im sure the lithium batteries are better.
This clearly is one of those tools, you get what you pay for. As a point of constant reference, the girlfriend keeps her 18v dewalt lying around (that she is proud of), and when parked next to my bosch 18v (on a project she is assiting me on), I can really admire the difference between to tools that have similar specs and size, but where designed and built in different galaxys, as far as ergonomics, fit, finish, and balance, all I can say is wow. I think this is one of the items that a test drive would be great, or find a real hardware store that sells tool and has them out or accessable so you can hold them. Even HD has a decent selection out of the box for playing with, you might notice differences that way and what you think fits your hand and has some balance, then factor in price. When you find something you like, post it here and get some feedback on that model, if its a turd, you will find out in a hurry.
Good luck hunting, how about letting us know what you find and why you bougth it ?
Take care, Bill