I also use an AI 2D. It ate part of a set of bugle boys, but since I put back the tubes it arrived with (a mixed set of NOS), its been stable and sounds great. At this point I'm leaving it alone.
I use a new Grado Sonata 1 on a VPI Scout, and am perfectly happy with the sound. The biggest improvement (as my friends are tired of hearing about) was the addition of a VPI 16.5 vacuum cleaner.
There are a few things i love about the 2D:
- no detents on the volume pots. My tube amp and speakers do not match exactly side to side, and I can adjust for this, as well as my position on the listening couch.
- bass control. For a tubed preamp, I've not heard better, even from high priced stuff
- grain free treble. The AI replaced a much newer VanAlstine T8, which had a quieter phono section, but didnt match the AI in low end grip or treble clarity and refinement.