I insured the M3W with Grundy and switched my Lotus from Liberty Mutual to Grundy and I'm paying $1,082 for both cars. Couldn't enter 2017 in the drop down so just entered 2015 then called and had them change it over the phone.
That seems like a pretty good deal. Hagerty is really competitive when insuring vintage vehicles, not so much with late models. My 57' +4 with a $30k value is only $120 a year.