It really depends on where you are hunting , which you do not divuldge. There are only two machines that will work in both fresh and salt water with a high success rate. The CZ-21 and the Excal.
I have absolutely no idea why you would want to go any deeper than around 30 foot though. I swing the CZ-21 for 4 reasons. 1. it looks professional, 2. it is silent and I can hear boats that want to make propeller bait out of me, 3 it is sturdy and works fantastic, 4. I hip mount it, so swinging the rod and coil is a breeze.
The Excal also works but I think it is ugly and noisy.
The Tesoro's are good machines but you would need two if you were going in both fresh and salt water. The Tiger Shark and the Sand Shark.
The Whites BHID is rated for only 25 foot.
I love my CZ's and I swear by them. ANY machine will work in the hands of a person that LEARNS his equipment.
IF you are strictly salt water, disregard this advice.