My previous boat was a 320 and I currently own a 37.5. However, my friend has a 35.5 and I helped him bring it back from Key West, FL to Hampton, VA two tears ago. I can vouch for the 35.5 as a nice waterway and coastal boat as long as you have crew to get through the night offshore. The 340 is vary similar to the 320 and I only did cruises in the Chesapeake Bay on the 320. I believe you will find that both are comparable as to interior and comfort. However the 340 will have a bigger cockpit and updated interior layout. If the 340 has the arch over the cockpit I think you will like that better than the 35.5.