How important is the rack you use for your components

For me, very important simply because I use a TT (Michell Engineering GyroDec/SME IV/Clear Audio Maestro Ebony V2). See my previous post on this system. I purchased a Core Audio PlyCraft 3L rack to hold the TT and other system components and could not be happier with the equipment rack. Incredibly well built, beautiful to look at and and incredible acoustic isolation between the TT and loudspeakers. The sound is crystal clear and vibration isolation is so good you can actually jump up and down in front of the TT without any affect on the cartridge tracking. I am there!

The rack is part of the system. Nuff said

I agree that a good rack is important and will influence the sound of your music. I'll also add that physical appearance is also important to me. I'm not going to buy a rack that has an excellent sonic ability with what is placed upon it unless it is physically appealing to me.
There are many very good racks available that look and sound good, luckily I own three that are made by different manufacturers.
I agree with mgattmch and his comment regarding the Core Audio PlyCraft 3L rack. I received mine about 10 days ago and as already mentioned it is incredibly well built, beautiful to look at and incredible acoustic isolation between my amp, transport, and Dac.

@randy-11 -- nice, but requires a pump and air supply to operate. Also I worry that they require a fairly hefty minimum load.