Best tippet material 2013? ...... Still the same favourites or are you trying something different?
I still use a lot of Drennan sub surface, mostly in the 3, 4, 5, 6lb ranges; it's proved reliable, consistent and not expensive. It's good for droppers, as it seems to have the right stiffness not too tangle too much. It's not the thinnest out there. Useful on lochs when pulling flies, or when light/thin diameter isn't the most important factor.
For thin work, I use short lengths of Riverge Grand Max flouro - expensive but then it is very thin to weight. Also got some stroft super soft, which has been OK (but not used extensively).
Tried a couple of spools of maxima green this season, and been happy enough with them - the spools are large diameter though, so they don't fit in my usual tippet pocket and often get left at home
cheers
iain