For relics, parks and fresh water beaches for coins and jewelry with some submerged fresh water thrown in, you have several choices in VLFs. Nokta Makro Anfibio, Nokta Makro Multi Kruzer, Nokta Makro Simplex, Garrett AT Pro or Max, Whites MX Sport and the Equinox 600 and 800. All of these are proven performers and are advertised to be fully waterproof and submergible, and they have notching patterns or user friendly notching abilities that can make coin and jewelry hunting easier sometimes. If you are wanting to detect in wet salt sand or shallow salt water the Anfibio, Kruzer, Simplex, MX Sport and Equinox would be fine. If you aren't planning to submerge your detector you can add the XP Deus, Whites MX7, Garrett Ace Apex and the Minelab Vanquish which will do well on salt water wet sand and all of your other scenarios. If you don't need notching you can add the Garrett AT Gold and the XP ORX. If you plan to hunt a lot in really mineralized dirt or difficult dirt with lots of fertilizer, manure or salt seep, the Vanquish and Equinox for sure can handle just about any really bad soil conditions. The Simplex, Vanquish and Garrett Apex are high end entry level detectors that offer incredible value for their detecting ability. The rest of the ones mentioned are mid level/intermediate detectors that are great. For the best all around detector that can do everything (not the best) but really well, the Equinox is hard to beat. For the fastest in iron trash/relic hunting and the most ergonomic, (and the coolest in my opinion) the Deus is definitely top of the hill. Lots of really avid hunters have an Equinox and Deus or a similar combination. Some people that are not quite as rabid about detecting have the Simplex and Vanquish 540 which cover everything except gold prospecting. The Equinox and Vanquish use the latest version of simultaneous multi frequency operation from Minelab which has much faster recovery speed and better target separation than earlier BBS and FBS multi frequency.
Others will have different thoughts for sure. There is some older tech that still works great. Personally, I like displays, tone options, waterproof and wireless audio if possible and I need salt water and high mineralization capabilities, so my list is skewed in that direction.
I am giving my opinions here, but I am also lucky enough to have used each of these detectors in the past 5 years so I am not just blowing smoke from reading specs or blogs.