Headphone Amp Question

Hi All,

I received a free pair of B&W P7 headphones and am using them directly from my Oppo 105 CD player.

I would like to run the headphones through my Prima Luna Dialogue Premium pre amp to a headphone amp.

What are the good choices in a tubed headphone amp that would match well with low impedance headphones such as the B&W's?

Would/should this improve the sound by adding in the PL preamp sound?

Thanks,

Scott