KJ, I bought an iTroll in 2013 and used it a little over 200 hrs, trouble free. I would recommend the iTroll. I chose not to get the hunt feature but understand that feature is nice. Good luck in your choice.
Here's a link to an old topic I remembered reading. Enter downrigger cable in the search box and you may find more topics as well. I put 150 lb power pro on one of my semi manual riggers and haven't experienced the cable hum.
http://www.lakeontariounited.com/fishing-hunting/topic/49978-anyone-using-powerpro/?hl=%2Bdownrigger+%2Bcable