Because the HD signal is transmitted at lower power than the conventional analog signal, an FM station's HD signal has a much smaller coverage area than its analog footprint. In your situation, you might get better results if you could replace your antenna with a higher-gain, directional antenna. And it's likely that without a better antenna, you'll not be able to receive the HD signal on 88.7 at your present location.
With a better antenna, you might find that you prefer the analog signal to the HD signal. HD radio relies on a lossy compression scheme. Some listeners are satisfied with that, just as some listeners have no complaint with mp3 files.
With a better antenna, you might find that you prefer the analog signal to the HD signal. HD radio relies on a lossy compression scheme. Some listeners are satisfied with that, just as some listeners have no complaint with mp3 files.