I got a nasty shock when my renewal arrived today, last year's was €650, this year they're looking for €830

That's with Zurich through Britton, who (in fairness) have been very good in the past.
Anyway, I've been ringing around insurance companies and I found O'Malley Griffin (in Limerick) the best: http://www.omalleygriffin.ie/.
They offered me fully comp. for €680 with Setanta. They proved the cheapest for Dragonheart too.
When I told Britton that I had beat their offer they came back with a reduction to €713.
Now I still have to find out exactly what the difference is between the policies (NCB protection & breakdown cover ect.) but it's looking better now than it was this morning anyway.
It's also worth noting that Sananta will let you use your NCB on more than one car... http://www.setantainsurance.com/resources#product-21