[GroundUrMast]

A few thoughts;

Trees do cause problems. How much trouble tends to vary with the season. As the sap flows up and down and as the leaves come and go, you'll see more or less attenuation. The vast majority of the signals are strong and 'line-of-sight'... not everyone is so well off. I doubt the trees are going to be causing too much trouble.

Given the strength and number of signals, I am not convinced you should need an amplifier of any sort. Have you tried removing the amplifier completely? Depending on the type of amplifier there may be an indoor and outdoor unit, if so, complete removal of both parts should be tried. An overloading amplifier will produce less, not more, usable signals.

Antennas and related parts such as the coax, splitters and matching transformer will all deteriorate in the weather. Water leaking into connectors and cable leaves you with unreliable and variable signal at the TV. The only reliable fix in that case is replacement of the coax and connectors.

If the antenna is over ten years old, it may be the wrong type, before the digital transition in 2009, far more stations used VHF frequency assignments. An old VHF antenna will not offer the performance you need since most of the stations are using UHF frequency assignments (refer to the 'real channel' column of your TV Fool report).

The HD1080 is a good recommendation in your situation. It offers both UHF and high-VHF capability. It''s compact and easy to install in a variety of locations. Facing west, it should provide reception of most all of the stations in the green section of your report and a few of the yellow section stations.

If you opt to install a new antenna, I would encourage you to replace the coax with new RG-6 at the same time. If you are driving three or more tuners, I could suggest a distribution amplifier that will have low noise and resistance to overloading. I would recommend that you install the antenna, coax and any passive splitters first. You may find that you have no need for amplifiers at all.