I'm an intermediate level windsurfer looking for 6.0m sail for blasting, learning to waterstart and carve-gybing. I know NP Expression leans more towards freestyle but can it be a good all rounder as I have seen some 05-06 sails up for sale.
I think the Expression will be good for your needs. In the tests the expression was characterised as a freeride oriented freestyle sail. It is reported that it has more "racing" feel than other freestyle sails. I din dot recognise this harder feel when used but i'm sure it is comfortable for blasting and jibing.