Hi all, just wondering if someone could tell me the difference between the more expensive $300+ softboxes and the $300 and below softboxes? I am aware that some have a lip around it to prevent spill light and others with different interiors (silver, white, ect.). Is there a really big difference between them? If so what are the disadvantages to the cheaper ones? Thanks for any help since I am looking for some for my Speedotron strobes.