Hi, I am looking at getting the AKG k550 headphones, but the standard cable is too short. I need around a 2-3m extension cable, but have no idea which ones are decent or not. Looked around a bit, but all threads seem to be a few years out of date, and cables by some makes (i.e. Grado etc) seem to be 4.5m's. Looking around £25, cheaper is better, but will pay more for something worth it. Preferably a 6.3mm male to 6.3mm female cable. Any info is greatly appreciated. Cheers.