How about a T-amp?

Most important I suspect would be an amp with very low noise, since it will be rather noticeable through such sensitive speakers. I have been impressed by how low the noise is on my SKA based amps, I can't hear any at all.

You could go for something like an SKA board, or a gainclone if you like, driven from a fully regulated supply (Teddy Power-regs?), since it wouldn't need much power.

Have a look here - http://www.pinkfishmedia.net/forum/showthread.php?t=39306&highlight=teddy+power+gainclone