I can't comment on the acoustic properties of the fabrics but I certainly like the subtler shades of the anchorage line as well as the feel of the fabric. If you are using black for the front wall and grey for the side then your panel fabric color will be crucial for determining the feel of the room. Blues and cooler colors will give the room a colder feel, while warmer colors, like maroon/purple will make the room feel warmer and inviting. I am going to use black for the front and grey painted side walls with only some acoustic panels adding accent colors. With that in mind here is a picture of the GOM fabric I am considering. I will most likely use the Aubergine on the far left and then use a hint of gold in the grey rug to bring out a little more color. The 3 colors to the left are some more blue family colors which includes the Cobalt one matching the one you had in your picture. I like that color a lot and still could go that way :)
I think the shade of grey will also play a factor on which way you want to go. Get a paint color fan deck from one of the paint companies and hold it up next to your fabric swatches, some greys go better than others.