I have a question.

I have had my Canyon Grail SL CF8.0 for a year and a half now.
It currently has stock wheels (DT Swiss G1800-700c).
According to Canyon the maximum tyre clearance is 42mm.
I would like to buy a second set of wheels.

Now I have 2 options.
I buy a new 650b set and put gravel tyres on it. I don't know if that will work on my bike, and what width tyres I could fit then.
I keep my current set (G1800) and put road tyres on it.

or

I buy a new set of road wheels and put gravel tyres on the current set.

suggestions? tips?