Hitari,
I too am considering the Kondo IO-m or IO-j cartridge. I am going to use it with my Shroeder Refence (tonearms for which I am a dealer). Whether or not you purchase a Shroeder, my strongest recommendation is that you get a tonearm that has fully repeatable adjustments for azimuth, zenith, VTF and SRA/VTA. Most tonearms do, but amazingly, many do not. In particular, many struggle with repeatable, easy to adjust on the fly, SRA/VTA. You will find that in order to get the most out of your cartridge/tonearm setup, you need to be able to adjust (with repeatability and accuracy) all the parameters above.
Thanks, Pat