I have an Aria 926 and Denon-X4000. My listening preference is 80B and allowing for THX movie level headroom (20db) and distance, the power requirement are well satisfied by X4000's 125WPC. I enjoy music\/movies in my setup very much. However I always had my doubts if an amp would somehow make my speakers sound differently. Backstory - When I auditioned for the speakers 5 years ago, the dealer had many boxes of instruments (yes thats how much of a noob i am:) ) in the setup. I distinctively remember Natlie Merchant Peppery Man sounded as the best piece of music I have ever listened to in my life (Even though I have never listened to that song or her before!). After buying the speakers and installing in home and listening to same song ... it was good yet something was lacking. I had lived with it for the past 5 years bidding my time (Yet enjoyed the speakers every day). After countless hours of reading forums and debating to myself, I just bought my first ever amp Emotiva XPA-3. Cant wait for them to come in and listen to Peppery Man again.\nMy question is: is "not clipping" the only reason to use an amp or are there other benefits to consider. My quest is to get the same feeling I had when I first auditioned the speakers. Thanks for all the great discussions.