Navionics vs. Garmin Bluechart 3

[tomtriad]

I plan to purchase either a Raymarine Axiom 7 with Navionics chart package, or a Garmin GPSMap 742 Plus with their Bluechart G3 maps, both around $500. I would appreciate feedback from those with experience with both of these charting programs and/or plotters as I've never used Raymarine/Navionics; my experience has been with Garmin chartplotters and Bluechart only. I realize there are more recent improved models offered by both, but these are particularly good price points as they are older technology.