Neale,
I've being using an Arai for the last couple of helmets due to a bad head shape. They changed the internal shape and the bumps don't fit too well. It ended up being a choice between the Neotec and GT air, basically the same helmet, almost, with the Neotec having the flip front. I was going to buy one of the new Bell helmets, but they are not designed for people who need to wear glasses. The internal foam doesn't allow for the arms of the glasses to go down over your ears.
Got a good discount at Team Moto and paid $799 and they swapped the cheek pads for free as part of their service. Normally another $50. Not a fan of Team Moto as a rule but they beat the price from my mates shop.
Sean