I am thinking of getting some Adorama #57 Thunder grey,anyone tried?Any complaints?This is for a backdrop for my turned pc.'s.The graduated sheets[no. 9] for example...do you think they are represented fairly accurate online vs. in your hand?If I had a sample, other than online, i would get photo tech, either #9,39 or 928..but the size i want to get..i got to be right the first time. thanks Rob