I was in Denver last weekend, I visited a shop at Holly and County Line, the name is Holly's Quilt Cabin, they have a very nice selection of all types of fabrics and projects.
I also went to Snappy Quilts at Orchard and University, they specialize in bright contemporary fabrics, such as Amy Butler, etc. Great American Quilt Co closed this spring, so if you Google and find the name, they are sadly no longer there.