I've an enormous head.
My primary winter helmet is a Giro air attack. Extremely comfortable. Bounced it off a road last week, with the head inside, no visible damage.
My summer helmet is a Cratoni Terron. Extremely comfortable as well. Never been bounced off the road.
Sportpursuit is good. I've bought loads of stuff from them, but you could be waiting weeks for delivery. It will give you an estimated order date when you order and this is fairly accurate in my experience.