Cammo I couldn't agree more with Sluggy. The CC's are not enough to keep up with 600 series. The LCR 600 goes very well with my 604's.

I did listen to the 603's and I preferred the sound of the complete seperation of mid and bass. I was fortunate and had the ability to listen to them side by side. Both are incredible for the $.

I did not listen to the 602's. They do not reach frequency's below 50Hz and the 603's 44Hz. I like to turn off the sub when listening to music and the 604's go below 39Hz. But, if you leave your sub running for music and your cut-off preference is higher than 50Hz then the 603's or 602's would be the logical choice.

All depends on your use & preference & ear. Let me know what you decide. Hope I helped.