My Supratek also had some issues (response of the phono was messed up), and while I would agree that Mick should not have been in charge of service (denying the problem, rude emails, etc), I would like to say that Kevin Covi, the US repair tech for Supratek, is awesome. He fixed me up, politely, professionally and promptly.
So, without questioning the integrity of others, aside from technical/service issues, the Supratek Syrah is still an excellent sounding $2,500 preamp. Best in the world? Probably not... but I would not hesitate to A/B it to any $5,000 preamp