Scotty 2 - more iconic look, though as has been said, it depends on other releases. If others are all TWOK, I'd prob prefer the radiation suit. Either way, he didn't spend much time in his "official" uniform in the movies so I don't see a need for it.
Also - re: the TWOK radiation suit - he also wore it in TMP (with some minor changes), so it could go with TMP as well, if those ever get released, which is a bit of a win-win on that one.
Of course, the vest could also be paired with TNG....decisions, decisions!
Troi is easily 1, just because it's what she wore more, and also that's what Playmates released first, and was therefore what she appeared in on my bridge as a kid.
Worf depends on other releases too. I'd say generally he looks better in a ponytail, but if we're getting a DS9 Worf and a FC Spacesuit Worf as has been hinted, I could go with the Karen cut just for some variety (also, assuming it's the same body, you could also pop the head off one of those other two and do a swap).
Quark - eh, don't care. As long as we get him. Probably 1.
T'Pol - we've seen the Archer proto has the later seasons shorter hair, so it's gotta be 2 to match. Though personally I really liked 1. That said, I think I prefer the blue or the purple outfits to the orange.
EDIT: T'Pol also changed them between S3-4, adding rank pips, an Enterprise patch and a hit of blue (for science?) to the shoulders. Not sure if I really like those, but S4 was the best of the show, so maybe...