We own an 07 Pilot 34 hardtop, with twin engines. As stated earlier, no vibration issues with the twins. Maintenance with the twins is greater, and somewhat more challenging physically, but it is manageable. The every day stuff like fluid checks can be done from the inboard side of each engine. The oil drain and fill is remote, but the oil filter on starboard and a couple zincs on each are on the outboard side, but those are semiannual or less frequent items. The twins will provide a little better cruise (15-16 kn) and top end (21-22kn), and also less draft, about 2.5 feet vs 3.3 feet
If you go with the hardtop, which I would recommend, look for the later models with the sliding side windows. Even in the Florida heat, we are quite comfortable underway. As David mentioned in another thread, the boat can be a wet ride in a breeze at higher speeds, on the windward side. The sliding window on that side would likely need to be closed, but you can leave the opposite one open, allowing nice airflow.
Other issues, are hull slap and "sailing" while at anchor. You likely have experience with both from your sailing days. You can play around with an anchor bridle to reduce sailing, and eventually you get used to the hull slap.
We came from a sailboat as well, and have really enjoyed our Pilot. Good luck with your search.
Brett