Having been unable to locate a pair of the Dynastar 8000's to try on the hard packed conditions to compare the performance with the B2s I decided that I'd go for the B2s anyway. I was already pretty convinced that the B2s were the ones for me and I got to the point where I didn't want to be skiing the XScreams anymore. Want new toy now...
I decided that I'd go with the B2s and picked them up from the shop this morning... Now to try them out on this nice new snow...