Yes, I agree the
Graham Slee Voyager is a safe bet. The aesthetics often come under criticism, but I guess that's a matter of taste. You really can't fault the sound quality - no doubt due to the perfectionist design and QA process by the guys at
Graham Slee.
You may have seen we're now listing the
iBasso range of headphone amplifiers. These portable amps are really interesting. Not only do they look the part, but I would say sound quality with the higher end models is rivalling the Voyager. The
iBasso D2 has the added benefit that it has a built-in USB DAC for listening via computer.