I just wanted to point to another alternative... tubes are great, don't get me wrong. I have Antals 202, and also experienced a little too harsh treble-depending on recordings. All solid state gear, transport to DIP upsampler-to DAC. However, when I upgraded the front end to a single unit modded universal player... this brightness disapeared. These speakers are exceptionally revealing of what is fed to them..... and very sensitive to "digititus" and jitter. I have no idea what your source is, but I believe the quality or matching of the source can be more critical than the amp.
These are great speakers, good luck.
These are great speakers, good luck.