I have compared the two and concluded the HPA-2 was more refined and communicated the nuances of the musical details more effectively. Don't get me wrong, I liked the KAV 250. I liked the sense of authority it gave to the music and, of course, the bass. (I own a krell fpb, so I'm not a Krell basher). But, if I had to choose between the those two, I'd go with the Proceed.