GPowered: I upgraded to the Mundorf Silver in Oil Caps for the 'Dragons this week and the improvement was not small nor subtle. It was a huge upgrade even before any cap breakin. I have a Mundorf Resistor to install also but I am going to have Eric make the new Crossover for me so I have not added that in yet. For anyone wanted a major upgrade, this is it and right now the caps are on sale at Parts Connection.
The vocals have more body, more three dimensionally, and are silky smoothe. Overall tone, timbre, and balance are much improved. It is about $500-600 to upgrade (and that's the sale price), but it is a major improvement and improves on an already great speaker.
My next step is to add much needed bass traps to my living room as I still get boominess from the speakers and I have several bass nodes, but I am now quite content with the speakers.
I am running them now with a two watt 45 amp from Don Allen (yes two watts) and the imaging, soundstage,clarity, and detail and pure musical enjoyment level are all amazingly high. I also have a Decware Tori mk III that is a fantastic match also but the bass from it overwhelms my room at the moment so I am mostly using the two watt 45 and it plays well up to 75 dB or so at my listening position.