I wouldn't guess who's going to be in the Final 3 by those previews. Survivor is notorious for showing scenes for upcoming episodes that are not even from those episodes. I think they do it just to throw people off, or maybe even just to put something visually exciting in there when the episode may not be that interesting.
I sure hope Terry wins it all. He's been my favorite Survivor of all time. He's just a pure winner. I've never heard him whine like some of the others, yet he's been pretty much alone against Casaya for several shows now.
Aras, on the other hand, comes off as extremely bratty to me, especially when Terry didn't pick him to accompany him after he won the "time with family" challenge. Terry had to choose someone, and it certainly made sense for him to pick Shane and Cirie over Aras and Danielle, based on the types of family members involved. Yet Aras tried to turn it around on Terry, basically implying that his need to see his mom was greater than Shane's need to see his son, or Terry's wish to see his wife when we WON the challenge. Then last night, Aras tried that "Terry is whining" card, when Terry was simply trying to understand the rules of a challenge. He then said something about Terry being sexist, of which there has never been a hint on Terry's part. The attitude of everyone against Terry is unbelievably poisonous. I think that envious, petty attitude will come back to haunt anyone who would have to go against Terry in the final 2.
I think if it came down to Terry and Aras, Terry would win. I think the jury will see Terry as the best, and fairest, survivor and Aras as the selfish, immature brat he is.
Editing to add: Am I the only one who thinks Aras' hair looks absolutely ridiculous when he does that weird little pompadour with it? I mean, it looks as bad as Ed Grimley's hair in my avatar picture! I think Aras does a lot of things to draw attention to himself, and this trick of his hair is a bit over the top.