Thanks for the info, Hatfield. Sounds like you have spent quite a bit of time getting it right.
The noise issue with the Fi is the last sticking point for me. I've got a little hum now from a PP amp. There's no way for me to audition the Fi, so it would be a leap of faith.
Matthew: Great speaks! I'm looking to build a new house in ~3 years with a "from scratch" listening room. I'm saving coins (literally) with the intent of getting the Double Ben's. I think the DB's and some Fi mono's could be my last change (that's been said before!). I'd love to hear your single's with the Fi. I'm told the singles are much more refined and complete compared to the Abby's.
Cheers