I think you can make a strong case that Tanaka should be the top free agent that we pursue:
1. If he's a legitimate ace, it takes that sting out of potentially losing Harvey for 2014
2. When Harvey returns, it sets us up with 3 potential aces (or more) at the front of our rotation if we hang onto our young pitchers, and they continue to develop. This is a great model for post season success.
3. Best argument- it makes young pitching more expendable to trade for top tier offensive players. In a lousy free agent crop, we would have prime assets to improve through trades.
I think if you spend the money on Tanaka, then we go into the season with the hope of a great rotation, that will only get better when Harvey returns. We could begin to realistically talk about trading for some of the names that get thrown around without turning an area of strength into a potential weakness, or if we hang onto pieces, we give ourselves more options as the season progresses to make moves at the deadline if we were in contention.