I like the PFD's w/ a harness built in. By far IMO a tether/harness is the most important piece of safety gear.
Rules number 1,2, and 3 = Stay on the boat. You stay on the boat, a PFD, survival suite, strobe, whistle are never used.
I have a cheaper SOSpenders auto inflate/manual inflate PFD w/ built in harness. There is a strobe and whistle attached to the inside of it.
What position will you have on the boat?
Flash light w/ red lense is good, but a head lamp is the cat's meow. Not a lot of tasks on the boat you can do w/ one hand.
Merit 25 # 764 "Audrey"