I think it may be more important to concentrate on the fabric itself - and ignore the label/brand (except for care instructions and fiber content)
I just realized that most of my fabrics are almost ten years or more old. In my opinion, some of the less expensive lines from that era (VIP, Peter Pan, Marcus Brothers, Springs Industries, to name a few) were as nice or nicer than some of the more expensive lines from that era (RJR, Hoffman, Alexander Henry, SSI, Kaufman)
Notice that I said SOME for both categories.
In some cases, if someone did a 'blind test' - without knowing who made what - I think the less expensive lines would be considered 'better' quality!!