I concur with Pat all the way. Power Boats also gave the ICOM 402 an excellent nod. Locally, here on the lower Chesapeake Bay, the DSC is just beginning to be functional. The USCG is not aboard, yet, but they are scheduled soon.
I'm running the ICOM502 and have been very satisfied with the sensitivity and audio quality. Not knowing your layout plans, you may want to also consider an external speaker that would be closer to the helm position.
I also went with the 8' Shakespeare Ant. I ran one on my last boat, 18' SeaRay, for 16 years without a single problem.
I would suggest, not that you wouldn't, to pay particular attention to the hull feedthru and its wx proofing/seals. Next would be the proper routing and proper assembly of the PL259/ UHF connector that mates to the rear of the radio. This may all seem obvious, but I have seen many problems where I have repaired this connector due to a lack of proper assembly. The most common would be the braid has been either pulled out, or a minor amount, due to being cut too short, making contact with the shell. Corrosion would be the next.
If you are not familiar with these connectors, you may want to find a ham radio operator who could throw it together for you in abt 5 minutes.
:roll: Oh my! This was a little more than 2 cents worth....
73s
Sea Angel