Best Amps match for Egglestonworks Andra 2 ?

Hello,

I have a pair of Andras 2 powered by a pair of Pass Labs Aleph 1.2 themselves driven by a CD Audio Aero Capitole 2 and a BAT VK 51 SE. Pretty good system but I would like to gain more soundstage and even more musicality and rythm.

Does anyone have a recommendation for a pair of mono amps achieving an even better match with the Andras 2 and the Bat preamp than the Aleph 1.2 ?

Thanks for your help.