Preamp suggestion for Quicksilver M120 amps

Thank you gentlemen!  Audible Illusions M3, there quite a few variations, what is your take on it? MC phono, is it descent?

LS 25 MKII? LS 26?

Anyone has an experience from Audio Note Kits preamps?  Simple circuit, high quality parts, reasonable pricing, sounds interesting. Opinions appreciated.

Currently running  Prometheus TVC passive pre. As far as price want to be under 2K used. Don't think I can get a pre with good phono at this price point, so line stage only. 

Thank you Johnny!
Definitely looking at QS pre. Looks like I will need some good NOS tubes. Can you make a recommendation? As for the phono, I have read it's a bit noisy and may not work well with LOMC. I have a choice of Sutherland PHD (battery run) and Allnic 1201 at this time.

Thank you guys! Just bought QS line stage non remote current version. Very exited! Now need to figure out the tube upgrade.

I am getting a used LS, should be ready to go for me. Will report back on the sound. I am running JM Labs Utopia Diva Be speakers, 89 dB. 

Will report back. Greatly appreciate your help!!!

Got the Line stage. Spent 20 min listening. Compared to solid state Simaudio Moon P5 , it feels like I lost the grip of M120s. Solid bass, full midrange are gone. Need to do more listening.  

OK, now I am confused more then ever. Have 3 preamps on hand: QS LS, passive Prometheus TVC and Simaudio P5 (dual chassis). QS was the least favorite of the 3: no weight, very lean, dry sound. The TVC gave me some weight, transparency. Simaudio was the best, it owned the M120s, full rich sound, very spacious.
Now what? I was hoping QS would be the ticket. Stock tubes, I do not think the amp was ever opened. Do I take a chance with NOS? 

Anybody had good results wuth QS power using a SS pre?

Gents, please weight in!

I can keep P5 pre.
Really wanted to have a good tube pre to match the M120s.
Hoped for a synergy within QS brand.

The QS was not tampered with, the original tubes and caps. I did invert the polarity.

No mono switch, only power and tape bypass switches. Looks exactly like the one on QS website.

OK, I have a response from the seller I got the QS from. The unit may be not broken in. Do I leave it on for 24hrs? What is the best fastest way to get it done?

Thanks, I will not give up on QS just yet. Think I will connect a source to the pre and run it for several days, than put it back to compare.

Anybody can comment on how is Audible Illusions sound vs QS LS?

The pre responded to tube rolling, I like how it sounds. Still a question if it's better than Simaudio.

Need to address an issue with the power amps. Both produce a vary audible hum (big trannie on the left), can hear 60Hz from the speakers.

How do I clean up AC power? Balanced transformers? Isolated?

Thanks.  

The amps hum with the rest of the gear off.
I did try lifting the ground with no success.