For what it's worth I jumped on the M-802 just before they were discontinued and glad I did. I would not spend the money
on an 803, and would have kept my M-710 or looked for a used 802. The meager 'upgrades' of the 803 simply were not worth the money
. I wrote a blog post
about my decision.
IMHO, the 803 is a let-down. The external spkr is optional, the built in speaker is crap. There is no headphone jack on the control head
(to satisfy IPX7 ratings), it has a built in GPS
(good) but based on NMEA 0183
rather than NMEA 2000
(they could have just taken an NMEA 2000
input). The direct sampling improves rx sensitivity, but technically the 802 and 803 are pretty equal.
IMHO, adding a bandscope and soundcard to a marine radio
is pointless. Most people, even hams, do not spend a lot of time on the radio
...net check-ins and that's about it. At anchor
...maybe more (but, I'd rather sit on the beach with my Elecraft and a Buddipole dipole or CrankIr and a nice cold beverage). At dock
...virtually zero (too much noise
at most marinas).
If you're spending a lot of time on the radio while aboard, the 7300 might be a better choice for you.