I am with Footman James (insuers are actually Sun Alliance) for my 2 bikes and never had a problem with them, have been with them for the last 6 years there prices have alway been competative, i have commercial vehicle insurance with Adrian Flux and i will not be renewing with them under principle as they really annoyed me
I think the problem is alot of these brokers are getting bigger and bigger and employing monkeys, back about 20 years ago when i was about 17 i used to work for a commercial insurance broker and i remember dealing with footman and flux and back then, they were very small and very very good to deal with they could sort anything out we had problems placing, and if they could not do it not one could, unfortunalty times have changed, in some ways for the better but in some was not so good IMO. i can actually get cheaper comprehensive cover than Third party fire and theft...............go figure...
i assume you have tried putting on a mega voluntary X/S ?