Unless you want to make it a ´ricing spoof´ car, don´t put decals on it. It would make me ashamed to be an escort owner if i saw a car with a bunch of stickers all over not so hot looking paint. (unless of course I knew it was to make fun of hondas including the one I saw with white rims, white "rip" down the sides and the altezzas).
If you´re going to get an OEM wing I suggest the 91 or 92 GT 3 piece wrap around spoiler. Since that wing was on only 2 years of the car it´s quite a bit more rare than the 1 piece that´s on 93-up GTs and LXs.
Maybe you could do an intake extension, or upgrade your spark plugs to Bosch platinum two, or even four prong spark plugs, with new wires.
Maybe put in a short shifter and change out your shifter linkage bushings. (if its a manual)
You could put in a nice sound system. I got an MTX 150 w amp and a 200w 10" sub along with my Pioneer 5x7s and 4" clarions in my doors right now and I´m loving them. Just a few slightly expensive ideas for you. ;-)