Hi all, I'm curious to know what the best program for using fully submerged underwater on the Deus II. I tried beach but gets a lot of interference. Diving is stable but I feel that I am missing out. Any notes?

I'm a diver and looking to buy an underwater metal detector. The only viable options on the market are the Garrett Sea Hunter Mk ii and the Minelab Excalibur ii. They seem a bit outdated in my opinion. I'm leaning towards the Excalibur ii but I am a bit hesatant. Has anyone seen any news about any potential new models coming out on the market anytime soon?