I have two Echomap 93 SV Plus at the helm connected to a GT 30 mounted at stern and a GT 8 epoxied in the bilge all connected to a GMS 10 for sharing and a 93 SV plus at bow with a CV 54 transducer on trolling motor. The bow unit is fine as I have it on 2D about 90% of time when fishing. I am seeking better side vu and down vu at console. My question is there another transducer that would give me higher quality screen viewing or is it time to upgrade to the Ultra units. I have become pretty proficient with the settings probably not perfect but have clocked in a lot of time fine tuning the settings bur not completely happy with the results. I fish no deeper then 30 foot . Any suggestions will be greatly appreciated.