Well, I´m absolutely a fan of Nubert speakers. I work on them for several years now. They´re clean and cheap. But also fun.
You can order them only direct at:
www.nubert.de. You have a full four week return garanty if you don´t like them.
I just purchased a pair of Nuwave35 and I´m very happy. Some problems in the high bass range but that´s my room. They´re amazingly flat in their frequency response. Formerly I had boxes from the Nubox series and they don´t resolve the spatial information very well. So, especially for orchestral stuff, I highy recommend the Nuwave series.
And for the bedroom or other computer workstations the smallest Nubox (I think 310) is amazingly fun and very very cheap, too.
Thanks for your HZ listening tips. I´m very curious now.