jbl LS80 speakers

I'm new here. I recently bought a pair of JBL LS 80 speakers. I am using a NAD 7600 receiver & NAD 568 CD player, with Kimber 8 cables. I also have a pair of NAD 275 amplifiers and a NAD 165 preamp. My question is which set up should I use and how much power should the LS80 need. Thank you and have a great day.