I recently got the 73sv (non chirp) and love it but if I think I would have been happier with the 73cv with chirp. I get really good images with mine but the chirp gives so much better target seperation.
I've also looked at this model which is much cheaper and has everything minus the Side imaging. Anyone heard how they are? Lowrance Hook-7 Mid/High/Downscan Fishfinder/Chartplotter with Insight Pro
I have a hook 7 and love it! Down imaging is great on split screen with 2d you can really see what your looking at in 2d with the down imaging. I learned a lot with it.