What speaker cables to buy for my Krell s300i amp?

My system consist of OPPO Bdp-95 blu-ray/cd player, Legacy Audio Classic speakers and the Krell s300i integrated amp.
Can anyone help the Barbman on a beer budget in selecting a
decent pair of speaker cables for my system? I'm currently using an old pair of Wireworld Atlantis cables in the full range mode but would like to bi-wire as I have in the past with other systems. I listen mainly to Jazz,Blues,mellow rock
classical and concert blu-rays. I've been reading up on Audioquest, Nordost, Kimber cable, just to name a few but don't want to spend more than what my Toyota cost to attain good sound from my current system. I keep hearing from reviewers who tested the Krell s300i that speaker cable selection was the key in getting the best performance from this amp? Thanks to all my audiophile friends at Audiogon!