Between Mike and I we own three SR009s. Mine is the oldest (3 years old) while his latest one was purchased in February of this year and his older one is about a year old. Surprisingly my 009 is a tiny bit mellower at the top end than Mike's. And we do have good amps to drive them Birgir, one of them is your KGSSHV mini, full-size KGSSHV, BHSE, and my DIY-T2.