I don't have fios but as long as the stb's built in deinterlacer is good, 1080p would be better as it wouldn't lose any detail on either 1080i or 720p sources. But if the deinterlacer is bad, you might prefer 1080i to let the TV handle deinterlacing, although you may lose some detail on 720p 60fps programs, like some sports or news programs. 24fps content however will retain all of the detail on all channels due to the TV's ability to reconstruct a proper 24fps source from a 60i signal.verizon fios users. what is your stb set to? 1080i 1080p 720p?
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