Used Analysis Plus Oval 9s are a tremendous upgrade over what you're using - new about $700; used about $350. They come to this site frequently and they are superb cables.
Or, make your own bargain cable that came out very highly in comparison tests with $400-800/pair name-nrand cables done by The Absolute Sound a few years back. Purchase 12-gauge exterior extension cable from Home Depot and fabricate your own. Cut it to your preferred length, clip off the green ground wire at both ends and use the black and white wires for your negative and positive wires, respectively. It shouldn't cost you more that $30. and you'll be amazed at the improvement over the Monster stuff. If you don't like the looks of the orange cable(s) you can buy black cable wrap in the HD electrical section at about $2/10' to cover them. I've made several pair for friends with mid-fi systems and they've been amazed at the improvement. If you don't like the sound, which I sincerely doubt, you're not out much money and you can give them to a friend. Give them about 20 hours to 'break - in."
Good luck.
Or, make your own bargain cable that came out very highly in comparison tests with $400-800/pair name-nrand cables done by The Absolute Sound a few years back. Purchase 12-gauge exterior extension cable from Home Depot and fabricate your own. Cut it to your preferred length, clip off the green ground wire at both ends and use the black and white wires for your negative and positive wires, respectively. It shouldn't cost you more that $30. and you'll be amazed at the improvement over the Monster stuff. If you don't like the looks of the orange cable(s) you can buy black cable wrap in the HD electrical section at about $2/10' to cover them. I've made several pair for friends with mid-fi systems and they've been amazed at the improvement. If you don't like the sound, which I sincerely doubt, you're not out much money and you can give them to a friend. Give them about 20 hours to 'break - in."
Good luck.