It depends on what your goals are.
I chose to use Hagerty Insurance (
www.hagerty.com) because:
1) They have *agreed* value. Meaning we came to an agreement on the value of my car, and that's what I would be paid if it were destroyed/stolen. Most insurance companies do not do this, they use appraised values or book values.
2) Places like Leland-West wouldn't touch a car like mine (but they probably would yours if original).
3) Hagerty has language that allow driving for pleasure, where places like Grundy's does not.
4) All this is assuming limited miles, not a grocery getter, etc.. which I assume is OK with you since you were asking about vintage insurance.
If this is just a daily driver, you would be best with state farm or you current insurance company on other cars/house/etc...