. . . comes courtesy of “Robin Laws”:http://www.livejournal.com/users/robin_d_laws/22916.html, who, being a dashing good sport, honored my “request for a word”:http://www.polytropos.org/archives/000440.html:

*alsperanzo*
_noun_
al-SPUR-ahnn-zo

: an experience that fully lives up to one’s lofty expectations

[Spanish *alta* _high_ + *esperanza* _hope_ + *alcanzó* _achieved_]

Thanks, Robin!