Best Budget RCA cables

Rocketfish at Best Buy. $15. Good insulation, tight fitting plugs and the center pin is split which allows for better contact with the female receptacle. You can widen the gap in the pin for even better contact. All good RCA plugs should have this feature or something similar. 

A vote for Benchmark cables...right in your price range and very well made.

I make my own. They give me eargasms. I used this recipe: 
http://www.image99.net/blog/files/4127b5fe2694586e383104364360373b-74.html

When comparing entry level Audioquest,  Blue Jean Cables, and Signal Cables,  i thought the Www.signalcable.com were the best.  The analog Two's in both rca and xlr are really nice cables.

How about speakers cables on a budget? $300 a pair tops for biwire.

speakers are Sonus Faber Olympica I, with Rotel RB-1590 amp