Some people like the phantom set up. This is with two towers and no center, but if you get to far off center, it does not work out for some listeners. I know nothing about the 603, but if you are just wanting to get in you need the following for future.... hdmi in and out, are there preamp outs?,
I don't think this will allow you to just use center channel for tv viewing, I just use the front three speakers when viewing regular tv, or just the tvs own speaker. My kids us the ALL speaker stereo for games and things. I only use all speakers when listening to movies in surround sound, tv no..
JP
For a 150 bucks.. go for it.