I've never used electronics for anything other than gps and basic downscan off the transom. I have a garmin echomap chirp 94sv at the helm now but I just got a new 12" lowrance hds live to replace it. I would like to relocate the garmin unit to the bow and run panoptix. My question is which transducer should I get? I am pretty sure my options are ps22-tr, ps30, and ps31. I don't have any experience with panoptix so I'm not really sure how these transducers differ and which would be best for my application. Also, will I need a sonar module or do these transducers work directly to the display unit?