Anybody use a Garmin 78sc in Santa Cruz/Capitola?

Hi,
I was thinking about buying a Garmin 78sc, since it has a built in BlueChart G2 US map.  How is this map compared to Navionics?  Does it show mile buoy and "surfers reef"?

I have the navionics on my iphone and it has those features.  But, I don't want to pull out my iphone that often for fear of dropping it.

The navionics shows the delta around big break really well, showing the fence post and other hazards.  I think with the Garmin I may need to buy the lakevu map.

Thanks for any input
Mark