Make sure you get one that is powerful enough, you won't regret too much thrust! Fishing in current and wind require considerably more power! And a long shaft! Again, if its 12" longer than you need you won't care...If its 6" too short and popping out of the water in a light chop you will be unhappy.
Universal sonar is the way to go if you want a fish-finder up front. You can hose clamp a transducer on the motor but it will get damaged, the universal sonar in built in and as indestructible as the rest of the motor.
If you don't like the foot control, consider getting a bow mounted hand steer, some guys like this set-up better!