Oh, them. The Audio Aero amps. The 50W push/pull model or their 40W Prestige momoblocks. As I can't get hold of them in my end of the world too easily I would value an opinion from someone with a similar system.
Please do not take an offence from my remark regarding your 'empty' room. As said, it looks fantastic! What I was trying to say was that I got the best sonic improvements in my system not by changing components but by carefully tweaking the room acoustics (after starting out with a room close to reference dimensions).