I've had a night rating for a little over 6 years.
My only point would be to make sure that you are comfortable flying on instruments, becuase if you inadvertently enter a cloud or fly over a dark area, it can be disconcerting unless you are okay on the panel.
Ou of interest, in the UK we can only fly IFR at night, but night rated pilots without an instrument qualification can fly visually, in VMC - crazy world eh?