I own a Luxman PD-444 and I am currently using a Triplanar tonearm with a Lyra Kleos cartridge - this combination is very good and I would also recommend using Lyra's Skala cartridge with this tonearm as well - Lyra and Triplanar are are a great combination from a synergistic standpoint.
http://www.positive-feedback.com/Issue56/cas3.htm
http://www.positive-feedback.com/Issue56/cas3.htm