I can't speak for your system and synergy, but there is a pair of used Luminous Renaissance for $85 or so and another for $150ish (new price is $200-$300, I think). They are extrememly fairly priced (considering how ridiculous cable prices can be) and a deal at full retail price, but the used price is amazing. I replaced a pair of Cardas Golden Cross ($1200 used at the time) with the Renaissance and felt they were better in almost every way. They may have been a bit more forward in the upper mids than the Cardas, but they improved on the overall resolution by a huge amount and the bass struck me as more realistic and defined. I preferred the Audience AU24 and the TG Audio wire to the Renaissance, but both are many times the price.
I would try a variety of suggested wires and see which you prefer. There can be quite a huge difference between brands, and all will likely react to your system in different ways. Good luck...
I would try a variety of suggested wires and see which you prefer. There can be quite a huge difference between brands, and all will likely react to your system in different ways. Good luck...