I used to have insurance with Dominion back in ON, they are GREAT. Not the cheapest, but come claim time, they are more than fair.
M coupes are driven by petrolheads who drive hardcore. M roadsters are driven by 50 something year old balding insurance salesmen, me & jay. Just demographics. I have friends with ferrari's and lambo's who have dirt cheap insurance (even in ontario). Super high end cars can be even cheaper than performance cars, because most people with a 360 baby it, store it indoors, and dont do 300 on the highway.
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Hot: 2001 Estoril M Roadster
ZCP 19's michelin supersports, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt ZCP 19's michelin supersports, deoranged, dechromed, led tails, ZHP knob, UUC SS v3, GROM, OEM 18's w310's,
Fun: 2006 YZF-R6, black