C-Map or Navionics?

Ok, here's da dill.

I have been rocking my Eagle Cuda 250 for about 7 years now and it hasn't died on my yet. 
My boy will most likely be joining me out at Depoe Bay this year using my Revo 13 paired with the Cuda 250.

This kinda puts me in the market for a new GPS/Fishfinder for my AI at this point. 

Really looking hard at the Raymarine Dragonfly 5Pro. With that it can be come bundled with either the C-MAP Essentials or US Navionics+.

I have zero experience with either one.   

So, if you have any tips or Pro's vs Con's for either...let's hear em!   

I own a Dragonfly 7 with Navionics, never used C-Map.  Very happy with it.  Its on sale with C-MAP, looks comparable to Navionics. 

http://www.hodgesmarine.com/Raymarine-Dragonfly-7-Gps-Fishfinder-Combo-W-Tra-p/raye70231-us.htm?

On Cyber Monday I ordered a Dragonfly with C-Maps, promptly cancelled it and ordered the bundle that came with Navionics+. If I remember my reasoning correctly, it was because C-Maps only had coastal contours out to 10 fathoms. C-Maps looks like the way to go if you fish freshwater. If you fish out in the salt, Navionics+ is the ticket.