BC, WA coastal trails riding

I’m working towards adding some new toys. But I have one unanswered question. I see alot of single track trails from my current Jeep windshield. I’m looking to move off the forestry roads and such into other territory.

Real question is do I need a 50" Trail or are the 60-65" models just as good because 50" is too wide anyway?

I plan to ride mostly around the GVRD, Squamish, Whistler type areas with occasional trips elsewhere. Unlikely to spend much time on Dunes, mostly mountain type trips.

I’m hoping some local folks will chime in and help me out.