The last few lbs are always the most expensive

Look at unsprung weight first. Wheels/tires are probably your biggest gains.

Hollow sway bar? How much do your shocks/springs weigh? Sunroof chassis? There's some extra bracing up there that can be swapped IF the SE's were available w/o sunroofs (guessing that they weren't)

There's some weight to be saved if you have power windows on the pass side. You're looking at 1.426-1.7 lbs per foot for tubing so you need to be able to save ~8 lbs for it to be worth adding a bar.

Fuel cell will probably end up adding weight... but in the rear where you might want it.

How heavy is the seat and bracketry?
Exhaust system?