I like #2- i like the deeper color better than #1, and while I really like #3 and think it is more "officey", it looks like something you could find cheaper at Targer perhaps? I have had good luck there finding cute sweaters that look way nicer than $16.
Not sure how much you want to spend or are only limited to the one's you posted however there's a 3/4 length sleeved v-neck brown cardgian at the GAP right now that is only $10. I couldn't find it on their website.
The brown is sort of like a milk chocolate color and not the deep brown.
Number one seems like it would be a hard shape to pull off for non-supermodels. (But maybe you are a supermodel and we just don't know it. ) Number two seems like the brown is ... almost faded? Maybe it's just the pic? I don't know, but that would bum me out, personally. I think the neckline on number three would be flattering/lengthening.
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