Well i'm not sure how your dollar values are in the league, but here is what i expect from Ackley next year including a majority of his career:
280-290 average (big jump i know, but i attribute it to young player struggles)
70-90 runs (closer to 70 next year)
60-90 rbis (probably close to 70ish next year)
Would you like those numbers from your 2b position? I think he has the talent to reach them, but depending on how much weight you hold to this year you might want to decrease your expectations.