I'd go for the Ventair, I've had both the peaked and skull version and they are fab hats, the comfiest I've worn and that's a fair few- I tried a lot of hats when looking for one that prevented me getting headaches when I rode and the Ventair has really impressed me, no more headaches at all, fits like a glove too.
i went to a big tack shop and tried on over 10 skull caps. 1 fits - and it still pushes my glasses down on the back of my ears which is what i dont want as its slightly painful!!
although the 3rd one you have shown the gold one did 'fit' , and i loved it was about to buy it, a senior fitter then came and looked at it and deemed it was not 100% perfect so im glad i didnt get that and that the usual hat fitter decided to get a 2nd opinion.
I would choose a vented hat over a traditional type any day - so much more comfortable. I have ended up with a hat that isnt vented, so in the summer i will search again for something vented for hot days but my CO pro skull is fine for Xc which is what i wanted it for.
The only thing i dont like about the HS1 is aesthetically i think the harness looks fab on some people, but can be a bit much on some others. I have a big head and tried one on and it just looked stupid - far too much going on.