I've owned the Crystals and have heard the Rainbows in about 4 or 5 installs. (About 2 were very nicely done) and I think it comes down to preference. I do disagree with the post that claims that they are harsh. They are from from that and sound very clean without the harshness. As everyone else said, midbass is definately lets you know its their which is does in the Rainbow also so I don't see much of a upperhand in either set their. The Rainbows to my hears have a better tonal sound than the Crystals. Honestly, they both perform well but its highly dependent on install and preference. I loved my Crystals with the music I listen to and would definately buy another set. If I was to go with Rainbows, I would go with the Germs, that's when the difference between a good set for the price vs a good set period is seen. The SLC's and SSCS6 are too close in performance wise and comes down to preference IMHO.