I was at the Boston Meet last month, I owned the shadow and listened to the TTVJ slim and the Pico slim. Both of these beat the shadow for openness, clarity and slam. I chose the TTVJ as I (my opinion) thought it was slightly better than the Pico slim in dynamics and warmth with my JH13s. Also the Pico was still not available, and I really thought all these amps were better than the Shadow. Since then I have also heard and now own the Headstage Arrow 12HE, which is comparable to the TTVJ slim and the Pico slim, IMO. Final conclusion, I think you would do well with the Pico, TTVJ or Arrow, and they are all better than the shadow.