I have a pair of 6.3s that I power with a Redgum RGi120s integrated amp. It is an Australian solid state. It is the most musical ss integrated that I have heard for the price range I was looking at($1000-2000). Very detailed, with quick, tight , deep bass, very fluid sounding, never bright or tiring. I am using an Arcam Alpha 8 cd player with Acoustic Zen matrix ic & Kimber 4TC speaker cables. Redgum is a rather obscure company as of now, but I believe it is just a matter of time for them to get some reviews in mags to get their name out there. I haven't found anyone else that has one, but I love this amplifier. They also have a 60 watt and 30 watt version of this amp.