Do what Cytocycle suggests. Transparent's recommendation is that it's better to have a high-quality single cable with jumpers than use lesser cables for bi-wire. My previous experience has borne this out.
OTOH, if you can afford to go the Bi-Cable route at or above the level you're at now (i.e. Ultra w/XL or better), do it.
OTOH, if you can afford to go the Bi-Cable route at or above the level you're at now (i.e. Ultra w/XL or better), do it.