Hi Suteetat,
Thank you for your reply. Last night finally armboard arrived to install Ikeda 407 tonearm. I also experimented with Kai and Kansui with different headshells, also compared them to Graham/Orpheus combo. I copy paste my short experience with them as I wrote in another forum:
"Finally armboard arrived. I installed the tonearm though I am not familiar with those (just know Graham). Did not much experience on antiskating will experience today. Installed Kai and Kansui to different headshells and tried (not quite sure the most optimum alignment but fair for a quick try). Kai is really special with 407, Kansui is also very nice but different. Kai excels in soundstage, liquidity, a midrange liquidity and presence to hear, upper tones almost excellent even from 0 hours. Kansui having better PRAT, more emphasis on midbass, still very good tracking and detail on mids/highs though not at the same level of Kai. Kai seemed to be slightly on the warm side though Kansui seemed more neutral to lean side. Btw, Kai was not bass shy, bass texture and decay seemed to better compared to Kansui. Certainly, breaking in and better alignment should be factored in to make any critical judgement. For sure, both cartridges provide sheer musical pleasure. Compared to Orpheus/Graham, both cartridges with Ikeda had better liquidity, better midrange details and highs while Orpheus/Graham combo sounded best in bass details (might be a function of 9 inch vs 12 inch, tonearm differences as well as tonearm cables)."
I would like to also listen to Q7 regardless of its price, size etc before I make my decision to upgrade speakers. I know it may be dangerous! :-)