Buy one better set used and use jumpers. I got a 2.5M set of used Golden Reference cables for less than your max, including a new set of Cardas jumpers. I use to be a firm believer in bi wiring but now have my doubts. Even if it is better you can always another set when budget permits. The Cardas is one of the best investments I ever made, despite its high retail cost. The Transparent Wave cables have a good rep but I haven't heard them.