I have 5se's (not MkII or III) and consider them some of the most musical bookshelves in my collection (among the likes of Dynaco 25, KLH 6 and 23, Polk Monitor 5, DCM CX-17, Axiom M3ti). The Vifa tweeter is very, very nice. However, don't expect them to reach very deep with any significant amount of volume. The 8" mid-bass driver experieces over-excursion pretty quickly with bass heavy music if you start to throw some power to it. Pair them with a good subwoofer and avoid any bass boost or loudness and it's a very pleasing combination. I've powered them with a 100 wpc Carver integrated, Kenwood M2 Sigma, and a 250+ wpc Hafler 500 and the littel Pardadigms sound great with all.