What should I do

Thank you very much for the advice. So many are correct as to my loving speakers and possible lack of experience with headphones. Yes when I've tried them, I've found them annoying . I have not heard HD800 and now off my list. I really need to audition Grado's and amp before investing on something I will hate. I will continue to confine my listening with Harbeth's to daylight hours while others at work. Thank you again.

Seeking your advise again had Vandeersteen 3's then bought a used pair of 5's. Best speakers I ever had. Had to sell when I sold home and downsized to condo. Boy are you LUCKY. Tried the Quatro's ,but not in the same league as 5's. Like the Hardeths at this stage of listening.and size of room . Gamut equipment to good to give up. Based on your comments ,I've zeroed in on WOO WA-22 headphone amp , Woo sells Grado's looking at GS-1000 i based on those owning Harbeths .What do you think? At this stage of my life 72 . Listening to classical,opera and Beatles,Pink Floyd and 70's light sometimes. Advise KEEP the 5's as long as you can and Don't get old . Thank you pointed me in the correct direction .