I've heard the K2 in the past and thought it was good, but not outstanding, albeit I did no comparisons at the time. I recently auditioned the Rega Brio-R, Cyrus 6, Audiolab 8200a and Naim Nait XS all through a Rega DAC and Monitor Audio RX6 speakers (Chord Rumour speaker cable). The Naim should have been the best given it's hefty price tag over the others, and was. The Rega Brio-R was the cheapest and the biggest disappointment to my ears, sounding not particularly detailed and having an uncontrolled bass. The Cyrus 6 was a big improvement, but I didn't feel it dealt with all types of music well. Once the Audiolab 8200a was hooked up, massive improvement, the bass was deep but fast and under control. Articulate sounding, but never strayed into harshness in my demo (I was mainly listening to rock). I found the Audiolab for as little as £630, a superb bargain to my ears. It's not at all bright as I was expecting after reading a review, a real all rounder. Having said that, I couldn't get that Naim sound out of my head and I bought a secondhand Nait XS!