you are probably better off without it...aside from decreased regidity in the roof, Nissan's sun-roofs have the tendency to leak pretty often...
3/5 of my friend's 240SX had leaky roofs plus a 200SX SE that also had leaky sun-roof...
donno if Nissan had improved on the weather stripping around their sun-roofs tho...
besides...those small sun-roofs are only good for venting off cig smokes...
the only sun-roofs that I'd recomend is if you are buying:
Subaru Legacy Outback with dual sun-roof
C230 coupe with its huge sun-roof
Porsche 911 with that has a full-glass sliding-roof (what's the name of that model?)
or RangeRover's with their dual-roofs too...
