hey everyone i am trying to figure which of these two to get. Kicker K60 or K65 or Infinity reference 652i. i am gonna power these with my HU (pioneer 8400). i dont think i am gonna put an amp on them at anytime . so which one wouuld give me a better SQ , allow me to play louder without distortion. basically which one would sound better

 

That my friend is a very broad question. The same item will usually sound different to different people. Some my like the sound of one and not the other, while someone else may just be the opposite. My suggestion is try and listen to both.
Now, imo, I like the Infinity better. Never cared for Kicker comps. Subs are fine, amps are ok, comps, just not my cup of tea....