Best tube preamp for Quicksilver V4 tube mono's (newest KT150 version)


Just purchased a pair of Quicksilver V4 mono tube amps, the newest KT150 version.  Will be arriving this coming Wednesday.

http://quicksilveraudio.com/products/v4/

Single ended
Input impedance is 100 K ohms
Input sensitivity is 1.5 volts

Now need to purchase a nice preamp.  Would like to get the most 'bang for buck' by getting a very nice condition used pre-amp.

On my radar so far is:

EAR 868
Audible Illusions M3b or L3a
Herron VTSP-360

I have had 2 different AI M3a pre-amps in the past, so I am very familiar with Audible Illusions 'sound'... not sure what is the differences between the AI M3b and AI L3a, besides the M3b having  phono stage options and the L3a remote controlled volume?

No experience with Herron or EAR, but from what I have read EAR, if compatible, may be the best performing?

Suggestions greatly appreciated. 

Also would like to hear from other V4 owners.


Rick
128x128Ag insider logo xs@2xrich121
"Best performing" and "bang for the buck" are all completely dependent on what type of sound and characteristics you're looking for.  Without this info you're just getting random opinions of what other people like, which may or may not mesh with what you're looking for.  A little further info will go a long way. 
I had the balanced and unbalanced V4's. I really enjoyed these amps, though I have never heard the KT 150.  I tried an EAR 912, and I can tell you from a sound and synergy perspective, it was a good match. I believe I had the balanced version of the V4's at the time. If I had these amps again, the preamp I would want to try would be Shindo. 
In your mind was there any difference between the balanced and unbalanced versions?
Jim
@fjn04 04-18-2018 8:12amI had the balanced and unbalanced V4’s. I really enjoyed these amps, though I have never heard the KT 150. I tried an EAR 912, and I can tell you from a sound and synergy perspective, it was a good match. I believe I had the balanced version of the V4’s at the time. If I had these amps again, the preamp I would want to try would be Shindo.

Which Shindo preamplifier?

Currently running a 6SN7 based tube preamp with my QS mono amps (KT150s) and really like it, thus maximizing the capability of the amps. Interested in what others have tried. Seeing several preamps listed on the Shindo site.

I have the VR, Vosne Romane. Funny on the timing here because I'm considering getting another QS...but either Sixty watt mono or Mono 120. This is to drive second speaker I recently purchased...Harbeth C7 w/ Ton Trager stands.Have not tried Shindo w/ Quicksilver but I have no reason to think it won't be wonderful. Great amp you just bought.