which unit for 360 imaging?

[Leroy_B]

Hoping someone can shed some light on an issue for me. I'm planning to buy a couple of HB Helix graphs and would like to put the 360 imaging at the bow. Does anyone know if it matters which Helix unit you use with the 360 bow transducer? More specifically, there are several levels of the Helix 9 such as standard, chirp and mega. Does the clarity of the 360 image get better with the chirp or mega compared to the standard? Since the 360 is the transducer I'm not sure if the image quality is better with the higher $$ units. I would appreciate some feedback. Thanks!!