There are 4 versions released or to be released (so far):
1. First Avenger (official movie costume)
2. Recue Cap (leather jacket, triangular shield, "A" helmet).
3. Golden Age Cap (USO show outfit, most like the comic but w/ triangular shield)
4. Avengers Cap
#1 and 2 are out. #1 is immediately identifiable as Cap. Outfit restricts articulation, esp in arms. Still a very solid figure. #2 is a technical improvement in many ways, but lacks the traditional look and shield if that matters.
#3 is a bit goofy with a more classic, head to toe spandex costume. Official specs aren't out yet.
#4 is the modernized uniform. Two shields (both circular, one damaged one fresh) and two head sculpts (w and wout mask). Has a Chitauri weapon as a bonus but not sure what use it is.
Of course, Cap 2 comes out next year so we may yet see a fifth figure.
So right now the questions I have for you are:
1. Do you prefer something closer to the classic look?
2. Woud you rather masked or unmasked?
3. Do you need it now or can you wait?
4. Do you prefer WW2 or modern look?
Good breakdown.