Keeping the Fire TV
I decided that last night, with the connection running in the low teens in Megabits/second because early in the evening I was downloading OS X Mavericks upstairs to refresh my Mac Mini to sell it, wasn't a fair test of the Fire TV.
Tonight, with the connection running in the mid-thirties in Megabits/second, I still didn't get 1080 ("UHD") on Amazon Prime, but the 720 image (upscaled by the Fire to 1080) looked like 1080, without the "halos" around titles I complained about yesterday, and with good detail on eyelashes (and not just on close-ups). It now looks as good as the Roku always has.
I have to work on the connection from my main router on my second floor down to the one in my basement theater, since drinking from the firehose upstairs I'm getting 84.57 MB/s - apparently I have to get up to around 50 MB/s in the theater for 1080, according to one commenter. I had been getting 60 - 70 in the theater, so I'll troubleshoot that connection. I think it may need a new power supply for the downstairs MoCA box.
Bottom line is that I'm keeping the Fire TV and giving my Roku XD|S to my daughter to drive her 720p flat panel, which was my original plan.
Last edited by Philnick; 12-12-2014 at 12:43 AM.