I am framing a print that is 37" x 14 1/2". The customer is concerned about weight. I know that glass will be heavy on something this shape and size, but I also know that just touching plexi will sometimes cause a scratch. Any suggestions? If plexi is the route to go, what brand or type is the best to use? Everything I have done in the past is glass, so this is a new venture. Thanks in advance for any thoughts.