Lots of opinions in here, but I think one guarantee/fact is that if you get an SDS rotary, NOT a hammer drill, you're going to be thrilled.
I have the new line of DeWalt 20V Max tools, including the hammer drill and the SDS and there's absolutely no comparison. The SDS blows the hammer drill out of the water.
One of the posters said DeWalt was garbage. That's a ridiculous statement. DeWalt makes some of the best tools on the market and I would put my cordless SDS against some of the corded versions - I'm that impressed with it. Another poster linked to it, but as I stated in my thread - I drilled upwards of 100 holes and barely needed more than one battery. And it drilled them
fast.
Skip to the 4:00 mark in this video (
click) and tell me how that's "garbage".
(oh, and grab some of DeWalt's "Rock Carbide" bits - they're great)