Juzz, another hooked into windsurfing,

I went with the Gath Gedi, light and doesn’t become a lead weight after a long session. They will post to you if you order on line. (they did when I ordered last year)
Use a seat harness, so you need to make sure that if you go vest, it works with a waist and doesn’t ride the both up under your arm pits.
Best is ask ad try before you buy.
Mineral