hi there,
i think if you are a professional photographer or video editor,and the Sony PMW-F55 can record XAVC with 4K resolution at 60 fps at 600 Mbit/s and 2K resolution at 120 fps at 400 Mbit/s. you must looking for a high quality of video to entertainment.According to this,you need to convert your XAVC to a protable format to edit,such as MPEG-2,cause the MPEG-2 format is supported by Premiere Pro perfectly for editing.
hopes it hlep.