Best Choice for Third Rotation?

Currently a part of an FLDP at a non-F500 (mid cap).

First rotation - Business Unit FP&A. LOVED this. Was able to be very involved as a 1st year Analyst due to the small size of the team.
Second rotation - Treasury. Haven't been in long enough to really tell how much I like it. Again though I was in love with that business unit FP&A rotation.

So my question is - what would be an optimal 3rd rotation to choose? It terms of what will give me the best chance of moving up in the company post FLDP. I love the Finance side of the business and dread the accounting. I've been thinking either Corporate FP&A or Investor Relations. In our program Corp. Dev and M&A are not options for rotational analysts. I could also go into an accounting based rotation (SOX, IA, etc.) but again I have a strong preference for the finance side of the business and thats the side i'll be on post FLDP. That being said if an acct. rotation would be THAT beneficial for me post FLDP I would be willing to do it.

My thought process right now is that IR would make me more well rounded, but on the other hand, assuming I want to land FP&A post FLDP dipping my toes in the water in Corporate could be very beneficial.

Would appreciate any opinions.

Thanks.