We have two of the new Gecko's in white, they have in inflatable head linings and a chin straps. The ear pieces are removable and you can add accessories like radios or torch/camera holders.
We bought the £99 seconds helmets with full face visors from ebay and they are great. A couple of weeks ago we travelled to the Isle of Wight in a force 8 and it was loads of fun as we were getting loads of waves in the boat but stayed bone dry and warm.
I cannot recommend them enough, here is a quick video of our trip: