[ADTech]

The 91XG, DB8, DB8e, or the ClearStream 4 are all viable selections for this location. Personally, I'd just go with the 91XG. Best bang for the buck, so to speak. However, if you want to ruffle the least HOA feathers and ignore your own federal rights under the FCC's OTARD rule, then the C4 is the least obtrusive of the group.

Because you are in a valley, the UHF signals have to bend to get down to your elevation. UHF signals tend to diffract poorly and unequally, so it is very common for antennas in 2-edge situations to have to be adjusted vertically (and sometimes horizontally) several times in order to find a "sweet" spot where all the UHF signals play nice. Be patient, whether in the attic or outdoors.