Perhaps too late if you've already bought something, but anyway...
Taking into account reliability, parts availability, and wading depth... it has to be a troopy (75/78/79 series Landcruiser). The bigger brother of the Hilux, they are truly indestructible.
More expensive up front, sure, but as they say - buy once. Our work vehicles are an assortment of modern 4wd utes (Colorados, Rangers, Tritons, Amaroks, Dmaxs etc) and they are, honestly, just rubbish. All of them. Cheap crap. The only modern utes I haven't driven are the BT50s and Navaras, and I can't imagine they're any different to their brethren. One issue is that modern vehicles seem to be built with a shelf life - and that results in a vehicle that's simply more prone to failure under extreme circumstances. The modern Hiluxes aren't quite as bad, but they're still not excellent.
Beware of wading in any 4wd, however; ensure your diff, transfer case and transmission breathers are extended into a dry area, and don't wade above that or the engine air intake. Or at all, if possible.