Helix 9 MSI + GPS C4N questions

[chowder]

I’d appreciate answers from owners of this technology or persons very familiar with this specific technology. Looking to find out : 1.) - Is the transducer sold with this particular unit ( seems like it’s the XM 9 HW MSI T ) the best choice or is it worth considering getting a separate transducer? 2.) Am I likely to get interference if I attempt to use this at the same time as a Lowrance HDS and a Garmin PanOptix system?  Thanks!