the wires that have served me well are, for biwirng : "soft sounding" canare 4s11, and for single-wring, the fairly neutral belden 5t00up10awg, and my favorite for its superior neutrality, definition, control, lightness, and flexibility: the canare 4s8 13awg.
These can be had for relatively little cash. Add techflex and they can look really good.