My last helmet and my first flip-face was a BMW System 5 in XL size. While it was a great fit for a while, it eventually got pretty sloppy, which probably means it wasn't quite tight enough when I first bought it. It wasn't all that quiet considering the cost, and was pretty bad for fogging up and letting rain in. The only thing I really liked was the snap-lock chinstrap.
I tried the new BMW System 6 XL helmet on when they first arrived in Jan/Feb, and couldn't even get my head into it it was that tight... very strange. And as I said, at around $1000 I just couldn't see the value in it.
I tried XL's in flip-face Nolan (varous models), Shoei etc... they were a comfortable fit straight up, not too tight.. but I didn't like some of the features, particularly the way the internal tinted visor is cut. When dropped down, I found it really annoying having a large circular nose-piece cut out because you see it in different ways from each eyes, and I find that distracting. Like holding 1 finger in front of your nose.. you see 2 fingers when focussing on a distant object because you can't converge your eyes to form a single image on the close object ( I work in film production and a lot of 3D productions and I see the bad effects of this sort of thing all the time when images aren't presented to the eyes properly.. it winds up hurting your eyes).
The Shark in L size was a little tight at first, but about 3-4 months of daily wearing its still firm but very comfortable, and the internal visor is "almost" a straight cut so doesn't exhibit the same distracting features as badly.
Only wish the snap-lock chin-strap was available out here... apparently they make one but it wasn't available on the models I tried.
Yes, there's a little wind noise from underneath.. being a flip-face it doesn't have the extra under-chin webbing that helps reduce that, but with the visor down and locked in place its pretty quiet.
I usually ride with the visor 1 notch open (behind Ztechnic medium windscreen), and on the Shark its great because one-notch is just a tiny crack open, on the BMW it was about 1/4" or more open.
There's good reviews of helmets on the US site Revzilla.com
. This link should take you to the Shark Evoline video... hunt around and you'll find other brands reviewed also. Just a pity we can't buy them from US and have them be legal here.... we pay significantly extra for the Australian Standards sticker.
They've also got a great section about helmet fitment
and reviews of different helmet features.
End of day, you've really got to try them on for fit, as I was surprised at the variation in sizing when I tested a lot of helmets back in Feb. Don't know how you'd manage that from Griffith, how many bike shops out your way.... ???
If I put a tape-measure around my forehead its about 585-590mm or ~23" (no wise-cracks.. please... lol) so according to their fitment I should be an XL... although he also mentions in the video on touring helmets that with the Shark Evoline to go down one size because they are larger size... which is what I did. :-)