Just bought myself a new full face helmet called the Shoei GT Air.
I read and checked as many reviews as possible before buying this helmet - and by far the GT got heaps of praise!!
Apart from the obvious safety reason, I bought this helmet because of the drop down inner tinted visor and the fact that the GT keeps most of the wind noise out thanks to its design.
Here is one of a number of YOUTUBE reviews on the Shoei GT Air:
Just thinking about a Full Face verses an Open Face - it would have to be better protection which includes not having your nose burnt by the sun - I learnt the hard way!