If you have never considered headphones, it might be time to buy a Bottleneck Crack w/Speedball upgrade or a Darkvoice 336. Both are available for under $500 and sound great with a pair of AKG K7xx (still available for $199 on Massdrop) or a good used pair of Sennheiser HD600, HD650 or HD700s for under $500. I believe you will be surprised what you are not hearing and you can easily roll the tubes until your ears are content.
PS - I own a top-end Meridian system with an Oppo 205 that I seldom listen to anymore in favor of the headphones.
Best, JS
PS - I own a top-end Meridian system with an Oppo 205 that I seldom listen to anymore in favor of the headphones.
Best, JS