For entry level pricing, and high quality on an absolute basis, I found the $180 per eight foot pair of speaker cables from greggstraley@yahoo.com to be able to replace $450 to $1000 cables in my systems. With money back home trial, I had the confidence to try a direct seller, and no one who listens can believe how little I paid.
The "correct cables" are those where you feel enough of a thrill to want to re-listen to all your CD's just to revel in all the three dimensionality, bass extension, detailing you never noticed before, and the rhythmic quality of music you experience when listening to the real thing.
I did not return either the speaker cables, or the $120 per pair interconnects, and I am guessing your own home trial would be a very positive experience. Lots of money left over to buy more CD's. Your system is hardly entry level, and you can get the opportunity to really hear the difference, for almost no money.