Yes, rear porting on the Epos would cause problems if too close to a wall. I have heard Harbeths twice (not in my system) and thought they sounded superbly musical, more so than Epos. I loved the look and feel of Harbeths, also, however, the Epos are damn well made and good looking. I think the Harbeth models I heard were music lovers speakers; midrange of purity and a natural presentation that just says, "Sit down and enjoy, forget everything except the music."
By the way, the ProAc Response 2 (not the 2.5) is a very nice speaker but out of production now for a few years.
By the way, the ProAc Response 2 (not the 2.5) is a very nice speaker but out of production now for a few years.