Here's two I am familiar with.

Cheap - This one is 11.00 and sounds good

http://www.knukonceptz.com/productMa...0RCA%20Kables#

Not so cheap but very good - Audioquest Diamondback. Probably about 100.00 pair from Audioadvisor.

I echo the sentiments of others regarding Monster. They are a waste of money.