Hi
Yes IMHO $180 for tracking + beach is well worth it
you also get 4 programs , a backlight and gold prospecting mode (prospecting mode is also good on the beach)
a DD coil for the beach is also a good idea on the beaches where I live
Check out which ones are waterproof if you intend on dunking them....not too many of the Minelab coils can be submerged.
Coiltek 15" WOT coils (in 3 frequencies ...3, 7.5, 18.75 KHZ) are brilliant on the beach and are DD and fully waterproof....their larger size covers more ground too
a simple cord around your neck to stop you dropping your machine in the water is also worth thinking about to protect the control panel
I have found lots of gold, silver and coins at beaches here in Australia...wet and dry
The best tip for the wet sand I can give you is to Beach mode , Noise cancel , Tracking On , and Sensitivity backed off until the XT705 is nice and stable
Only a stable machine will give you the best results.
A high Sensitivity setting is not the only ingredient to depth...stability is what you are after
If you are falsing - adjust your machines Sens back down until it is stable and / or slow down your swing
I run Sens. at around 18 where i live on the wet sand and up to 28 on the dry.
Best of luck
T59