hmm, I think so, the Denton definitely has limitation, I guess I can only play it at sweet volume, though the bass is nothing but impressive by it's own. Hmm, so I need to look for higher sensitivity speakers, with amazing soundstage, imaging, details, and accuracy. It seems I got few to be added into the short list include:
Grand Teton Gen2 (this should be my only choice, in most aspects)
Legacy Audio Studio HD (anybody can comment on this?)
Wharfedale Jade 3 (those can get it at good price, but too big for me, also need special stand for this)
GoldenEar Aon 3 (price pretty close and still affordable)
KEF R300 (actually not cheap in my country)
Sonist Concerto 2 (wow, this got 95db sensitivity, pretty high)
Clearwave Resolution 6 (used pair, still not cheap)
and few others which I'm not affordable:
Speaker Art Super Clef (owner is low profile, hmm...)
Reference 3A MM de Capo BE Monitor (high price product)
Joseph Audio Pulsar (neverland OR dreamland only)
Thanks guys!