I wouldn't use a HBU22 because you have two very distinct sets of headings. The HBU22 is very generous with its beamwith (the ability it has to receive signals while not pointing exactly at them). Since you have directions of E and NW to contend with, that's stretching past what I'd be comfortable with in a single antenna application.
That said, if you mounted on the roof. I would install the DB8e in the headings suggested above and wait on the CS600. CBS KLFY real channel 10 is putting good signal on you. There are times if a VHF signal is strong, a UHF only design will receive it if outdoors. It's a sheer horsepower thing.
If mounting outdoors, this is what I would do first. I'd encourage outdoor mounting anyway. Antennas do best when they have the freedom to receive the signals with as little obstruction as possible.
SS
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