Help In Purchasing

For make of boat, I would delete Azimut, as attractive as they may seem, their quality is dependant on the mood of the day they were built & the sub-contractor involved in the construction.
Galeon I jave little knowledge of, so will not mention.
Princess is generally a good quality. Predator is up there with the better boats.
Having said all that, you need to consider the engine room & the machinery therin.
All the vessels mentioned are designed & built for getting where you want to go at a higher speed. So when they were first designed, they were matched with high horsepower engines. I would start doing research on the engines in each boat before even considering other aspects because you are buying a boat that is way past it's warranty period with motors that may have run many hours (hopefully) or few (could be a concern) & the maintenance period is over a decade. In that decade, has the boat had proper maintenance for the motors? Something that you cannot be certain of, even if you have a full engine survey. So research what the issues are/were for that engine type. Which motors are the most reliable, easiest to repair & costs thereof. Also, very important, access to the motors. Do not be put off with high number of hours. I would prefer a 10 year old boat with 2000 hours or so than one with less.
Good luck.

Have you considered operating costs?

I would vote for the 62' Predator. I've managed a 2006 since 2011 and it is one hell of a seaboat and cruises 24-28 knots depending on load. The Princess quality isn't as good. Just compare the fresh water pumps, breaker panels, and swim platforms as a start. Everything is accessable, good quality equipment used throughout the build, well laid out. The only negatives on the Sunseekers of that era were the gelcoat cracking IF a Florida boat.

So your goal is too make a statement passing by ... wow.

Not sure a 20 year old boat in that size range will make a big enough statement passing by.