I bought a SolidTech rack earlier this year. I'm not sure if it really makes THAT much difference to the sound, but it's very sturdy and looks great. I like the hi-tech look and it fits well with my decor.
I also think the Timber Nation racks look great if that's the look you are going for.
I also think the Timber Nation racks look great if that's the look you are going for.