If you dislike the 627s, get the Earth. The Moon (due, I think, due to stereo crosstalk, going by RMAA measurements someone did) has recessed mids, which gives the illusion of greater soundstage. It doesn't sound like 627s to me at all. I was just trying the Pacific Valve config, with Sun and FET stage, and it's more 627-like with rolled-off treble. The standard A-mode config + Earth sounds right to me with all my headphones.