Need Help with Screen Size Asap Guys?

I'm about to order a Carada screen for my JVC HD1 and need screen size suggestion. Room is dark paint, with black ceilings. Room size is 19w x 24d with 8 feet ceiling. I want to do 134 inch screen, will I be able to go this large a screen, Im planning on the Criterion BW screen if that matters as well. Please advise so I can get this order in, not sure if I can go with the 134, if not my other choice was the 126. thanks