Speaker cable change??

Was curious (still again) concerning speaker wires and their sound effect in relation to my current rig. using original  (Grover Huffman) SX bi wired to my Slant 6s  (only) if I were to change what would you recommend? Since I am, I want to retain detail but still have full smooth sound and pick up additional enhancement in the bottom realm and since I'm using ARC CD 3 Mk 2 and DSi200 I was just trying to see if I could find a balanced compromise as I do know Silver would be smooth but, would probably brighten the sound more and not necessarily enhance the lower registers as I want? Would a hybrid be a better choice to achieve this?

Budget is a consideration, any suggestions from owners that have had usage with these types of gear? 

                                               Ray