Salary cap/Next move?

Now that the Greg Jennings signing has passed, what do you think should be the next move made by the vikings in free agency( if any)? Also, does anyone have a guess to how much money we have left under the cap? The moves i would make would be to sign Darius Heyward Bey, and a corner, maybe Nmamdi As-however-you-spell-it if he doesnt cost alot, anything over 5 mil i wouldnt want to sign him however. Brent Grimes would be nice if he isnt expensive also, but i would be fine with any quality corner, prefferably a young one.

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