Which is the best cable for Martin-Logan?

I purchased a pair of reQuests last year and tried the following cable Manufacturers: Transparent, Cardas, Goertz, JPS Labs, D. H. Labs and Harmonic Technology. Although each different cable had a positive virtue or two, only one released the "magic" hidden in the reQuests. The Harmonic Technology speaker cable was dead even or clearly superior in all categories to all the other cables. It was so good that I upgraded all of my interconnects and power cords as well. The speaker cables were about $900 per 8 ft. pair(bi-wired) and the interconnects were $250. The power cords were $180. The "single crystal" design of all of their products is simply a result of a better manufacturing process that leads to superior sonic results. Since the reQuests have to be plugged-in, I would reccommend buying the power cords first. The interconnects second, and finally the speaker cables last. Jim Wang of Harmonic Technology suggested that strategy for me and the incremental changes were astonishing.

What about..MIT MH 750 bi...?

Since you have already had many responses, I am not going to offer any specific recommendations except for power cords. In my opinion and the opinion of Audio Research, the best power cords are from Aural Symphonics (Univocal). I was not ready for the improvement, especially on digital sources and preamp. Amazingly, they make a major difference on ML's as well. A general piece of advise. All audio systems are just that, systems made up of components that all have some type of skew. Use the cable to tune to your tastes, but insure that the capacitance is right for your needs or you will be inserting the equivalent of a high pass filter between components and roll off the highs. The other issue is phase coherency. Most of the recent better cables are fairly phase coherent (improved resolution). Regarding Monster. I am not a big fan, although their M2.4 biwire speaker wire is a steal for a cable that is probably almost as good as the absurdly priced Transparent cables which are merely good wire with a Zobel network on the end to stablize impedence.

10-gauge stranded zip cord. Your ears and wallet will thank you very much. Challenge you to hear the difference.

I've had three different M-Ls (Aerius, SL3 and now CLSIIz). Have used Cardas, MIT, Tara, Nordost and XLO Signature. I've settled on the XLO with the CLSIIzs. It was a tossup between Nordost and XLO with the Aerius and SL3s (I was using biwiring for these two speakers). None of the cables sounded bad. I would have been happy with any of them if I had not compared them with each other (which, of course, is part of the fun). As a postscript, I think the Nordost bi-wires sounded best (with SL3s and Aerius i's) when I used a tube amp (Jadis Defy 7). Van