#6 is still much more "readable" than #136 when the logo is small. But #136 is more modern.
I like the "classic" look of #6 that recalls american football t-shirts or classic car racing but #136 is also nice for modern sports (Skateboard, snowboard, etc.)
I wonder if it's possible to marry the two concepts together...
Imagine the logo on motocross/snowboard googles: it must be long and bold on the rubber band (e.g.
http://www.dirtbikebitz.com/images/products/goggles/thor/2009_Thor_Motocross_Ally_Goggles_White_Gold.jpg)
but on shades must be small and round (but visible) on the side:
http://www.sunglasses-shop.co.uk/glasses/oakleywoman/enlarge/03511.jpgPLEASE KEEP THESE TWO EXEMPLES IN MIND when drawing the two versions of the logo.