[GroundUrMast]

The C490 and 7210P provide coverage of channels 2 through 69. There is no apparent need for the long elements that receive channels 2 through 6 (the low VHF band, 54 to 88 MHz). In fact the 'all-channel' antennas will also receive more FM band signal which will be a possible source of interference, though I have not run an FM fool report for your area. I would not recommend either of the above antennas in your situation, because they don't match the channel line-up you are presented with.

The 4-bay panel antennas, such as the DB-4, CS-4, CM-4221, HD4400, U4000 all have similar gain and beam widths. My understanding of the CS-4 is that it is optimized for channels 14 - 51 rather than the older, pre-2009 UHF band of channels 14 - 69. All of the 4-bay antennas will have about 6 dB less forward gain than the XG91. All of the 4-bay antennas will have a wider beam width (45° to 75°, varies with channel) making multipath interference more likely than with the more narrow beam width (about 25° per Solid Signal) of the XG91.

'On paper', all of the antennas you have listed are steps down in performance. When aimed at KLTS, the XG91 should have received enough signal to easily drive a 2 or even 4-way split with no amplifier. Over amplification could be a significant factor for you.

The odd channels out would be 7 and 22. Channel 7 because it is not a UHF frequency and it is off in another direction. Channel 22 because it too is off in another direction. Would you be willing to consider using a channel insertion filter at the risk of loosing channel 21, KPXJ? I'm thinking of the Jointenna or an equivalent product from TinLee.com. I'm also thinking of a UVSJ and a cut for band H-VHF aimed at KLTV.

Or, are you willing to consider using A/B switching?