Best Tube Pre-amp to match THRESHOLD 4000 S/S amp


Fellow A'Gon member,I am searching for tube pre-amp to mate for my Threshold 4000 class A amp...a limited budget of $1,500.
Here are the gears I have in my possesion now:

Threshold 4000 amp
Jolida 100 cdp (tube)
KImber Kable 8tc (speaker wire)
Harmonic Tech Truthlinks ( IC )

And future monitor speaker are either Proac or Dynaudio.

Btw my 1st choice pre-amp:

Cary Slp-98 or Audio Research but less knowledge still of matching output impedance ( pre) to input impedance (amp).

PLEASE ADVISE TO AVOID MISTAKE.THANKS.PESCOLAR
pescolar
Finally after deep research I found the right answer regarding Threshold 4000 input impedance of 75kohm.

Any input added what best pre-amp I should get no more than $2k.

Thanks.pescolar
I have the Threshold Stasis 2, it is similar to the 4000. I have also had a 4000 in my system. I use the Audio Research SP-17. I highly suggest it.
SAS Audio Labs 10A $1595
One of the best tube pre's out there & one of the best cost vs. performance products in high end audio.
Just to say thanks to all inputs that you shared.

Almost complete system:
Pre-amp------Lector Zoe ( Tube ) NEWLY ACQUIRED.
Power Amp----Threshold 4000 ( S/S )
Cd source----Jolida JD-100 ( Tube )
IC's --------Harmonic tech " Truth Link"
Speaker wire-Kimber Kable 8tc's

NOW I AM SEEKING FOR THE RIGHT SPEAKER FOR THE GEARS ABOVE.

**************THANK YOU ALL************