The humming is nothing more than harmonic vibrations transferring from the boat to the wire. This noise is also transferred to the water attracting fish! Yes it is annoying... turn up the radio.

You can speed up or slow down... and even change the size of weight if it bothers you too bad. Then again- let the noise work for you.

I am not big on the braids. Seems to fray way too much for me- since I am constantly bouncing the bottom. Make sure you check the top roller before switching to braid. You may have some residual marks cause by the wire which will fray the braids a lot faster.