If "pro Humminbird" means use of them rather than a professional angler using Humminbirds-----
I use the Humminbird Imaging units since they are not only a search tool, they are a fishing tool. I spend a lot more time fishing than riding around searching. I search as I fish. The units are adjustable for both purposes. My bow unit gets the use hours with the transducer on the trolling motor. I wanted the best tool for that use and Humminbird Side Imaging and 360 is it.
They way you fish and the waters you fish should determine which products suits you the best.
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, SOLIX 12 SI, 360, RC-1