In my opinion all of them are simple to operate and will just take time on the water. It really comes down to what you need or want. I have the LVS32 and haven't seen enough of a difference with the LVS34 to determine I must have. However, I feel in the technology world the LVS32 software updates will become a lower priority, so I would spend the extra to get the LVS34 if I were buying today. The head unit/screen is always the most difficult decision. I'm just a weekend fisherman, so the 93UHD is plenty for me. My advice is call Brian with BBG to discuss and to already have in mind: budget, touchscreen or not, livescope only unit or sonar also, need for HDMI input.