Alright, I'll speculate, but my picks haven't changed since I posted this about 3 weeks ago...
(based on Luck staying in school to get get another year's experience and - more importantly - his Stanford degree)
1) Ryan Mallett, QB, Arkansas
2) Gabe Carimi, OT, Wisconsin
3) Dontay Moch, OLB/DE, Nevada
4a) Owen Marecic, FB/ILB, Stanford
4b) Greg Romeus, DE, Pitt
Don't much care about rounds 5 thru 7 - take best athletes available or, better yet, use them to trade into postition to get the 5 listed above. I'm willing to eschew the next Levi Brown, Danny Batten, Kyle Calloway, etc., etc. to get those 5 players
(Caveat - 4b assumes that Romeus recovers from back injury/surgery, passes physical, gets 'thumbs up' for future play from appropriate doctors/trainers)