I was thinking of using a PC to feed mp3s into my whole house aduio system. I was wondering if the quality from a PC with an average sound card would be decent. I have a midrange system and am not expecting unbelievable sound quality, but don't want hissing or crackling either.

Most sound cards (except the more expensive) seem to only have stereo mini plugs rather than RCA jacks so I would need to use a ocnverter. Is there a problem with converting the jacks?

P.S. I already have a MP3 player hooked into my system, but want more sophisticated control. I want to use a PDA w/wi-fi to select songs,etc.