Ejlif,
Before you spend another couple of thousand on wires, you might want to try the 47LABS OTA wire kit. I use it for speaker wire and interconnect in my Avantgarde, Levinson390S, Sun Audio 2A3 system. The stuff is amazing for the price. The kit retails for 600.00 and you can get it from Audio Odyssey. The kit comes with a mile of wire and enough connectors to make 3 pair of interconnect. You can use it for speaker wire and make Avantgarde jumpers from it.