Although I am a Futaba fan this is an unbiast comparison. I own the futaba 6EX FASST. It is a great radio and Ihave not encountered any problems. The receiver is about 1.5" long and half as wide. The spread spektrum consists of a pilot and sattelite servo. This would add a good bit of weight depending on what you consider heavy. We have a guy at our field that said he took a hit using the DX7. Im not entirely sure how this happened but it did. I would say go with the FASST.

Ian