I hope we don't get too excited about the idea of trading down in this draft, because it's not likely to happen. It's definitely not a matter of will, you can't trade down just because you want to.
Best thing that could happen is if Geno falls to us at 9 then someone might want to move up for him. Or Barkley.
On the other hand, if some of these mocks are right and they have 3 QB's going in the top 8 that would be great for us because we could pick almost whoever we want. Especially since those drafts also have 2-3 tackles going, a position which we don't need. So we could conceivably get our most desired player in the entire draft, or 2nd most desired player.
I'm pretty sure you're referencing my mock where I had: 3 QBs, 3 OTs, Floyd and Milliner dropping in the top-8.
The beauty of the quick run on quarterbacks and tackles is the increase in value it brings to the #9 drafting spot. Like you mention, we could literally get the highest rated player on our board. We could also use that leverage to entertain mild trade backs. Somewhere out there a team is absolutely bananas over a certain player. (i.e., Jarvis Jones, Ansah, Jordan, Werner, Lotulelei, Mingo, Vacarro, Austin, Patterson, Warmack, Cooper, et al.) and might be willing to part with a 3rd round pick to move up a few spots to get "their" guy. Add in names like DaMontre Moore, Eifert, Ogletree, Lacy, Allen...etc. and we can trade back up to 16 slots and still nab the cream of this draft's crop.
Is it possible? I think so.