Hi all,
I find bi-wiring makes a difference especially for ESL speakers. I also agree essentially that solid core copper cables make a good synergy with ML speakers. The rule of thumb basically is that if you can afford to bi-wire then it is worth it, otherwise a good single run of cables will do (provided that you also have quality jumper cables- those brass brackets that come with the speakers are not very good).
Why don't you post your thoughts on the new Martin Logan Club forum: http://www.martinloganowners.com
Happy Listening!
Zenaissance