Well for my 2 cents, I have an Icom 7200 for my HF side and a TM-D710E for my VHF/UHF both work really well for me, I was a Yeasu man for years but thought the 7200 looked better on board. Both work very well, as for antennas, I have a dual band on top of the mast for the VHF/UHF and use the back stay for HF (with a tuner) but have just bought a vertical HF antenna which is nearly 20ft long, which I shall have installed on the back stainless work. I am told (will believe it when I see it) that it covers 80m (3.5mhz) to 6m bands (50mhz) without gaps or needing a tuner. Anyway its worth a try and yes I do have all the needed paperwork to use both the Marine and the Ham bands.
The TM-D710E does contain its own GPS system and uses a system know as APRS which my local ham friends love to see when we out and about locally.
For what its worth thats my setup, excluding various other handhelds, and they work fine for me, infact my Ham station onboard is better than the one I have at home