Amp match for Wadia and Harbeths


I've recently taken delivery of a new Wadia 381 cd player and am now looking to find a suitable amp to partner it with my Harbeth monitor 30s.

I'm aware that some prefer using the built in volume whilst others prefer an active linestage. I'm specifically looking to hear from people who have found great amp match ups when only using the built in digital volume of the Wadia.

My budget is a max up to $7000 new or used . I listen mainly to classical music at moderate volume levels . Room is 17' x 14' x 8'.

Also as well as obviously the sound quality being paramount. I'm also looking for something with a certain iconic and classic quality that will be something I can own and be happy with for the long term. Just examples that come to mind would be say in SS , Nagra PSA (pyramid) Boulder 860, Pass Labs aleph 0 or Conrad Johnson Premier 350 or in Tubes: Mcintosh 275 , Airtight , Shindo or Viva.

I plan to audition as much as I can first ( starting first with the Nagra PSA and Mcintosh 275) but of course will not be able too for everything so any pointers and real hands on advice would be really appreciated.
128x128pcoombs
Spectron Musician III Mk2 with the V-Caps and Bybee SE Filters. I use it with my Wadia 581se. In my system, the Spectron is a good two steps up from my former Karan and Burmester amps.
I've been using a Wadia 850 directly into a ARC VT100 mk II since 2001. I've also experimented with an ARC LS-25 pre in the chain. Turns out I preferred leaving the LS-25 out of the mix. Heard better soundstaging and depth with no loss of slam, going the direct route. Adjusting dip switches in the 850 (allows its digital volume to read "over 70"; the recommended minimum level from what I have read), was simple and a good match for the VT100.
Thanks for the responses so far. 2 votes for audio research, maybe I'll check out the ref 110. The Spectron has been recommended elsewhere but I'm sorry I really hate it's styling! I'll also consider BAT. I'm soon to listen to the Nagra PSA but am concerned it maybe to dry sounding via the Wadia. My short list also now includes the Conrad Johnson LP66S/ LP125M and Aesthetix Atlas.