Although I haven't heard them at length, Gershmann speakers have always been one of the most impressive speakers I've heard at various shows--very transparent, open, dynamic, and musical, and they always make it into my top 5 at any given show. I'd put them up there with the likes of Silverline, VonSchweikert, Thiel, etc. in terms of pure sound and overall build quality and definitely a significant notch higher than the brands you mentioned above(although Energy makes some nice models as well). However, I've heard their customer support is atrocious, so it's important to find a good dealer assuming you can find a dealer. Hope this helps.
Tim
Tim