I live in Virginia Beach on the water, and dock my boat at my house on a lift. I fish primarily offshore from 40 to 80 miles out. I started with a 2014 Grady Freedom 275 with dual 150's this was a great boat for offshore, you had to pick your days, but it kept us dry, and warm in the winter, dry and cool in the summer. It was super economical the gas mileage and range was great. Kept it for three years, then I upgraded to the Grady 306 Canyon CC dual 300's beast of a boat, it handled the rough water like a champ, it is a fishing machine. I love everything about this boat, except when it got cold, I wasn't able to get a good curtain setup on this boat for cooler weather, and if the sea's got rough the boat handled fine, but you are getting wet. Had this boat three years, it was very similar to keeping up maintenance wise as the Freedom 275, good gas range and mileage, no problem getting 250 miles from a tank of fuel.
I upgraded this year to a Freedom 375 with triple 300's this is a whole different class of boat from the other two. With a 320 gallon fuel tank, and averaging .6 miles per gallon, my range was drastically reduced for offshore to 190 miles before empty, not a good thing when getting to the fishing ground and back is 160 miles. My trip to the Norfolk Canyon went from $500 to $1,000. But here are some of the advantages, and you pay for it. This boat is so comfortable to fish and travel in. The sunshade on the back is nice for deep drop fishing. The beam is much wider than the 275 or the 306, lots of room. The size and weight of the 375 makes it a dream boat to offshore fish. So as we all know the more comfort we want the more it costs. I have been incredibly pleased with all three of these boats, you can't go wrong with any of them for offshore fishing.
Hope that was helpful...