Recommend relatively obscure high end tube preamps


Just wondering whether people can offer advice on high end preamps worth auditioning. I am looking for those who have experience with more esoteric and expensive equipment (MSRP >5000). I've owned Wavac (never should have sold it) and now own the Aesthetix Callisto Signature. I've owned BAT, CJ, ARC so I'm not looking for answers on things you can readily find.

One that comes to mind is the Brinkmann Marconi. Any opinions?

What else is out there?

~ William
classicjazz
I had nice luck with the Joule Electra LA 150... I think retail is around $5250.
Emotive Audio Sira-LE.
Here's a guy who owns it and a pic of it.
http://forum.audiogon.com/cgi-bin/fr_memb.pl?0&1&listsyst&zzLinkoping
Any of the progression of Emmanual Go's First Sound preamps, beginning with the Presence Deluxe Mk II, very impressive, simple dual-mono construction, massive power supply, all copper-plated steel chassis, one tube in the signal path, tube shunt regulated B+, point-to-point, dead quite. Finally found my pre-amp-for-life ... ahem, I think.