Headphone amp combo ideas?

STAX. Without a doubt!

With due respect to the members of this Forum, you'd be far better off at a specialty site like Head-Fi Head-Fi
A head amp is much like a power amp.....it needs to be matched to the headphones you are using.
Because of the low power requirements generally......there are a preponderance of valve head amps available but if you're using electrostatic head-phones or some planar-magnetics.....you may need more power than the 2-3 watts commonly available?
You'll find all the information you need on these sites.
Good luck.

Red Wine Audio Isabellina (with a tube upgrade), the new version, if you like natural sound with great soundstage and ambience. End of the search for me.

With all due respect to Head-Fi, there are members here on Audiogon with every bit as much experience with headphones as the members on that other site. Who...you ask? Me, for one!

Podeschi, have you managed to try the Naim Headline with the Beyerdynamic T1? If not, don't bother to reply.

Thanks.