filter system to catch //stop water

This one was my choice also for my 70 series.
Whatever brand you end up with I think an integral part of the system is a warning buzzer in the cab, if you are not alerted to the issue of contaminated fuel you cannot deal with it

Yes Mick, have one fitted at your suggestion and replaced both the Fuel Tamer and OEM on the most recent trip!

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The Water Watch does detect water but doesn't stop the emulsified, dissolved water from going through the system. Any buzzer or light indication requires immediate action and even then "the dissolved in fuel" water will have passed the WW.
A dewatering filter is a good inclusion.

X3 for the waterwatch

If concerned about flow rate and hose sizes, you can fit two dewatering and filtering units plumbed in parallel so they have twice the flow rate and half the restriction and also twice the water catching ability and twice the filter area.
They may be more effective because the flow rate through each is also half.
Two Donaldson P 902976 low flow filter kits is and example. They will cost around $300 for both.
The large contaminant catch ability and water bowl x 2 would be an advantage for some travelling remotely and would therefore provide the maximum of what is required from a pre filter.
A water sensor can be added to these if required.
This is only one possible solution there are many combinations.

To be reasonably effective as a pre, it has to be around 11 micron or less so loading of the OE filter is reduced. The old 30micron isn't really fine for a CRD engine system and OE are typically around 5 microns.