I have been listening to the ST-1000 for over a year and have logged over 500 hours. These amps are the bees knees. They are superior to any power SS amp I have ever heard in bass extension ans control, transparency, and sweetness of the midrange and treble. As for dynamics, they blow the doors off any SS I have ever heard; just unrestrained power with absolutely no trace of strain, congestion or grain. For the money, these amps are a screaming bargain.
People amaze me when they obsess about these tiny differences in sound between amps. In it's operating range, unstressed, the ST-1000 sounds similar enough to my Sumo, Classe and B&K amps that I doubt that I could distinguish between them in blind tests. However, I am sure that on recordings that tax the amp (concert volume full orchestral and organ recordings) I could distinguish between the ST-1000 and the SS amps - the difference is at the power margins and that is the difference between good reproduction and superlative reproduction that approaches the absolute sound.