A lot of people with Martin Logan speakers use Blue Circle power cords. BC's Gilbert Yeung is also an ML owner.
The BC62 power cord is a good choice, but if you really want the ultimate, take a look at the BC68 filtered power cord, which was designed with electrostatics in mind.
http://www.bluecircle.com/index.php?page_id=1735
BC has also recently come out with a less expensive filtered power cord, the BC86PC which is listed under power conditioning on their website.
The BC62 power cord is a good choice, but if you really want the ultimate, take a look at the BC68 filtered power cord, which was designed with electrostatics in mind.
http://www.bluecircle.com/index.php?page_id=1735
BC has also recently come out with a less expensive filtered power cord, the BC86PC which is listed under power conditioning on their website.