RCA audio connectors are Red (+) and White (-) and are shorter and fatter than connectors you connect computer speakers to the sound card, sorry don't know the precise size off the top of my head. I have my computer sound card, an Audigy2 ZS, running into my receiver using the RCA plugs into the reciever. Sound is better than thorugh my computer speakers but not as good as the CD player. None of the systems you're looking at will give you really good sound. I think you'd get better sound out of a medium price set of computer speakers. I have an older set of Creative i Trague 3200 and the sound, at least for music, is pretty good and they were less than $100, they're 2.1, i.e., stereo. Unless you can get into components, i.e., reciver and speakers, I don't think the sound quality will be that good, again a decent set of computer speakers will sound better. I think you'd have to put in minimally $400 t0 $500 American dollars into a sound system to get it to sound better than a good set of computer speakers.