@tyil
Sorry, the thread didn't load fully, earlier.
I'd go for the Peated, but that is a personal preference. That said, the Oloroso is probably the higher rated whisky. I don't know anything about the First Fill, I've not come across it before. I would expect all of these malts will be excellent, you can't go wrong, it will be down to personal preference.
Do bear in mind these are all cask-strength and will have a kick.