Pairing Bryston 28b3 with tubes

Hello all

I have a pair of Bryston 28b3 monoblock which I want to pair up with a tube pre-amplifier.

I want to add that "tubemagic" to make the music come alive and I´m interested in hearing from
you guys what you recommend. What could be a great match with the monoblocs from Bryston. 

These are some of the pre-amps I´ve been reading up on.

- Cortese from http://www.supratek.com.au/
- Microzotle from LTA https://www.lineartubeaudio.com/products/microzotl-preamplifier

The speakers I will have is custommade with these specs

Drivers: 4 x 17,4cm
Treble: 1 x 2,8cm
Impedance: 7 ohm
Effect: 800W
Maximum effect: >20 kW (> 400 hz)
Sensitivity: 92dB-2.83 V
Power handling: 5w (min) to 2000 W (max)
Soundpressure: >130 dB/pair, 100 Hz (1,4 kW)

Thanks