The 450EB is built on the 450DA hull, which the Sea Ray guys call "the Ice Breaker Hull". While it is a cored hull, the overall design mitigates a lot of the risk of saturation. .......Solid 1-1/2" marine plywood; hull vents above the rub rail (and, therefore above the hull coring); transducers and intakes are located in a portion of the hull that is solid fiberglass and not cored; the 450EB and 45oDA did not come with docking lights mounted in the hull, if there are docking lights, a dealer added them as an option.
We have several EB's in our marina and I have run all of them at one time or another. We are on the Gulf Coast and subject to storms from time to time so when I am on an EB is it usually to get ready for high winds and a strom surge. And t hat gets me to my primary criticism of the Express Bridge design: The side decks are very very narrow so the only safe access to the bow and spring cleats is up and across the bridge and down the center walkway. That means you have to remove the forward and rear canvas and Isinglass curtains, then reinstall them, all in driving rain and tropical storm or hurricne force winds......not fun and dangerous...to set storm lines or to make an adjustment in lines.
The other criticism I have is the engine space is tight and difficuclt to work in.
Give me my trusty old 450DA and Cat engines over the EB any day..............