Preamp all the way... I've owned the Wadia 27ix and it never sounded good unless I had a preamp in the chain... more body, more emotive, etc. I also recently heard the Meitner front-end both directly to the amp and with a pre- in the mix... again, the preamp adds just that extra palpability that makes music sound like music.
Just my preferences.
Kevin
Just my preferences.
Kevin