Looking at getting a pair of Bushnell Legend 8x42 binoculars. I'm leaning toward the porro prism as opposed to the roof prism. I know both of these have fully multi-coated lenses and have the rain guard coating. I also know that the roof prism have the phase correction coating and they are a little lighter and less bulky than the porro prism. But I've heard in the past, (I think) that porro prism binoculars are clearer andmore crisp. And there is a big price difference. The porro's are much cheaper. So which is optically the best???? Thanks, Scott Woody