I need to buy a good used rotary hammer drill for drilling and chiselling a little concrete in my slab for a bath remodel I am undertaking. I found many on **** like, Hilti, Bosch, Makita, Milwaukee..etc. I wanted to get something maybe in the 10 amp range. Is Hilti the best made? Also does Hilti use a certain bit that only they can use or can other models like Bosch or Hitachi bits work with them also. Which Drill is good and will last the longest?