The number of bars is irrelevant for digital traffic. You can get 5 bars of signal and still be affected by simulcast distortion. The bit error rate is a little better of a measure. But at the end of the day, your ears are the most important. If you can understand what is said, then you are fine.
Also with digital, you either have it or you don't. There isn't good, better or best like there is with analog. There are some digital sites I hear perfectly, but there is no signal indication. Nature of that beast.