Help: Best choice RACE 7.6-7.8 sails 2008

Hi,

I have different possibilities to choice. How to rate it?:

1) NP RS-Slalom MKII 7.8 with X6 mast.
2) NS RAM-F8 7.8 with 100% Carbon mast.
3) Severne Code RED2 7.7 with 100% Carbon mast.
4) Gaastra Vapor 7.6 with 100% Carbon mast.

I’m 85Kg. Sail to RACE with ISonic 105 between 13 to 17 knots.

Thanks in advanced! Any feedback will be useful!!

SRLL