Just ran the comet through ssd.jpl.nasa.gov?horizons - my fave eph tool -
to check the general visibility on the planet throughout April when
PANSTARRS (as the MPEC writes it; shouldn't that be Pan-STARRS?) should be
brightest, +3.3 at the beginning and end, about +1 in middle of the month
- and this according to the usually veeeery conservative JPL comet
brightness formalism.

50 degrees North: from April ~15 (i.e. near peak) appearing veeery low at
dusk, situation improving slowly by April 25 (when the Moon is full but
150 degrees away), by end of April comet some 6 degrees up in bright dusk.

25 degrees North: in mid-April appearing in bright dusk, later in the
month higher but no real improvement over 50 deg. North

25 degrees South: in early April high (~20 degrees) at dusk, in the middle
of the month ~10 degrees high at dusk (at peak time), then quickly
disappearing.

So in a nutshell: go to S. America, S. Africa, Australia in early April
2013 - and just after peak brightness relocate to, gasp, Germany. Once the
orbit stabilizes I will do a more precise analysis. But I must admit I
haven't been as pumped since first learning about McNaught and running it
thru Horizons in 2006 ...

Daniel

P.S.: When I googled for this comet an hour or so ago, half of the (few)
web pages already discussing it were from the fringe. Given what these
weirdos did to poor Elenin, brace for something unimaginable here.
Imagine, a bright comet discovered with a telescope the U.S. military
financed - and coming to Earth after that has exploded anyway in Dec. 2012
... :-)