Hi Sean, Well since its your thread and you asked, I'll go a bit off subject and answer your question. There are some general rules about cables, that overall hold true... overall, but not entirely... Heavy gauge solid core transfers bass better, lighter stranded cables transfers high end better. Of course a lot of other things affect this.... wire coating (skin effect) purity and type of copper or coating on copper, is there a braid or only multiple individual strands...etc etc etc. Myself, My favorite cables were made of 38 gauge cotton coated litz.... Multiple stands were used in several different braids twist etc until we found the right mix.... final result was about a 9 guage cable... this was a very pleasing, yet detailed cable. In your woofers, I would probably use the heavy belden on the woofer, then make sure that you use one of the nice standed wires on your tweeter.
As far as your speaker cables, I'm sorry, but I have no experience with the Tara Labs, that's why I gave a very basic elementary cable explanation, to help you discover what might make a difference in your system. Next, don't throw in the towel yet, your speakers will continue to go through minor changes for quite awhile. I hope this all helps, Tim