Paul, It's possible. Third gen Firebirds are just now starting to appreciate. Up until now they've just been "old cars".
General feeling is that the ones that are going to take off will be the 84 Indy, the 88 GT and the Formula.
I'm also a bit partial to the 85 GT, since it was the first GT (and the first Fiero I ever owned, back in 85.)
People also make a comparison between the 85 V6 2M6 and the Formula. Both had the "base" body and the V6.
I'm sure that everyone has their favorite, though.