I wouldn't worry too much about a high speed transducer. 95% of the time, you'll only pay close attention to it when slow cruising and idling in strange waters. With the underwater gear only a couple feet from the transducer, if it does show shallow water @ 25+ mph you will have hit bottom or something long before you can react.
Charter Member Number 1
At some point in time people need to wake up, remove their cranial intrusion into their own rectal areas, and take responsibility for their own actions.