Speaker cable frustration for Merlin vsm mme

New owner of Merlin vsm mme, I am now using Straightwire Symphony speaker cables I bought with my other speakers.
I'm not sure what to believe about speaker cables except that I think a good gage copper cable should do the trick. I just dont see spending a fortune on cables like Cardas presence which are recommended for this speaker but cost alot more than I was willing to dish out (a few Thousand)
So my question is, I see cables like Morrow audio sp4 speaker cables that cost about $400.00 I can live with that for example. Anyone find a good solution to this?
Thank you