Softbox Brands

Which manufacturer of softboxes deserves my dollor: Paul C. Buff, Photoflex, Westcott, Profoto, Lastolite, Chimera, or any OEM of the preceding? My softbox use is for head and shouder photography and I am looking in the 30x60 or 30x48 size. There is such a wide variance in price between manufacturers it is hard to determine the best quality for the money. I am willing to spend good money for a quality product whose price is not over inflated because of brand alone.

Mark