I agree that you should read the white paper and Roger Sanders thoughts on the needs of ESLs when it comes to cables.
I have owned QUAD ESL-989 speakers for about 8 years and have used a wide range of speaker cables. Each have imparted a bit of their sonic characteristics on the playback of music. I have used Magnan Signature (rich with an excellent sound stage), Oritek S-1 (neutral, somewhat lighter bass), pure silver solid core similar to Kimber 4AG (pleasant), Shunyata Lyra (clean, articulate with a good sound stage although possibly a little light in the bass) and finally Sanders Sound Systems. I've written a review encapsulating my feelings about them that you can find here on Audiogon:
If the 57's are similar to the 989's then I agree that you'll be able to use a fairly wide range as long as their design doesn't tax your amplifier any more than the speaker does already.
Good luck in your search.