The more I think about it, the more I lean toward WR. You're not going to find a Mitchell or McConkey later in the draft. Maybe Javon Baker will be as good at the top of the 3rd, if he's still there.
The tackles are all developmental, and though I'd love to see Paul or Sumataia taken, I'd rather they trade back up into the bottom of the round.
Finally, we do need a future CB and a FS, but not necessarily for this year. As tempting as it is to grab DeJean or McKinstry, you don't know for sure that Javon Bullard at the top of the 3rd or Cam Hart taken there won't end up as better pros than both DeJean or McKinstry.
At this point, WR is your best bet, and it's a big help that there are 2 good WRs still on the board.