Okay, so I'm figuring on drilling my ledge rock and using anchor bolts to secure braced pipe bases for my Tee posts. Got the power end of things sorted out, but the hammer drill end is up in the air. I've used 1/2 and 9/16" Makita hammer drills for concrete. No real complaints, but I either lent out or someone stole my 9/16 drill so I have to replace it. I see the SDS type drills for sale. Obviously much heavier built that the pistol grip type I had. I might be drilling 100-150 holes or more. Is it worth the extra money to go with an SDS type? I'm figuring the holes themselves will be 1/2" or maybe 5/8", 2" or so deep. Thoughts?