For about four months I've been listening to the ref 3 with the SA driven by the AVA DAC, AVA Ultra preamp, and the AVA Ultra 550. I find the combination outstanding even though my room arrangement is far from ideal. To my ears, which haven't heard any really high frequencies in years, the sound is very clean, very transparent, and the bass is amazing.
I have heard lots of good things about the Salks (which cost more than double the Gallos), and I'd love to hear from anyone who has compared the two. I'd be tempted to switch to them if they are significantly better.