I'm from one of those companies that claims to have "the best and
newest"... But in our case it's really true! :-)

Our product, Coastal Explorer, is about to be released commercially
after more than six months in beta testing with over 500 users. It is
the easiest to use and most reliable navigation software ever designed
specifically for recreational boaters.

Coastal Explorer will cost $300 and works with BSB and Softchart
raster charts as well as the S-57 ENC (vector) charts that you can get
free from NOAA and the USACE.

More information can be found at http://rosepointnav.com/