Hi Tom,

I'm using the Yorkville w/my A4.

All 3 stands shown are quite adaquate as far as stabality and holding the weight. However, I prefer the Yorkville because it doesn't have the rollers. it sits flat on the floor.

As far as the Quicklok the side rails would interfere with the ON/OFF switch and the MIC and headphone inputs as well as gain controls which are on the sides of the Audya 4.

The downside to all 3 is that there is no room for anything else! Ipad, mixer, ETC!

Don P