My optimism is based on the noticeable improvement in signal levels in the last TVFR (25' AGL) you posted.
The full size UHF antennas give you a good shot at seeing signals with NM values as low as 0.0 dB (And it's not at all unusual to see signals with lower predicted NM values.) This presumes you are mounting outside, clear of trees and other obstructions.
If you insert a wall, roof or tree in the path... expect less. You'll have to install the antenna to find out just how much signal impact your roof, tree or other obstruction has. The 91XG and 9095 are long antennas, they may or may not fit in an attic. The 8-bay panel antennas are more likely to fit in an attic, and they will all be roughly the same size... But the DB8e is the most current 8-bay design and takes advantage of the change in frequency spectrum... The UHF band was reduced to CH-14 through CH-51 (Boo!) which gives the designer the ability to squeeze a bit more gain from the design than when they where trying to make it cover CH-14 through CH-69 (yeah!).
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If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)
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