Rami, that's pretty darned heavy! I must admit that although I know loads of players who prefer heavy instruments for tone and sustain, the majority of instruments that I've loved most in terms of tone have been very light; the whole insrument has been very resonant. All the best Fenders I've played have been relatively ight, same with Rics (my 72 is around 8 pounds and is my favourite sounding Ric ever by far), same with Wals, Jaydees, pretty much everything. Everyone is bound to have different prefences though.
Can't speak for Alembics because apart from an Essence I once played the only Alembics I've played which have been relatively light have been the set necks, and of course they sound different anyway.