I would use 2 of the Quintets for side surround and 2 for Fwide or Fheight depending on your room. You will get a more significant advantage. Fwide would be best if you can manage it unless you have a very tall ceiling. Very little if any sound comes out of the rear speakers. You would probably not even notice they are there 95% of the time.
No, Mr. Bond. I expect you to die!