T&T: "the best" AC system?

[badornato]

am about to bite the bullet and put an AC system in my KK42.  although we
never need it in san francisco, we spend a fair time with the boat up in the
Sacramento Delta area where it gets over 100 degrees frequently enough to
warrant relief.
the local AC guy recommends a marine air (dometic) self contained turbo
vector 18,000 btu unit we can put in the pilothouse bunk and vent over the
staircase between lower master and salon.
any experience out there with this unit?

-- 
bruce adornato
kk42
amelia