Using the draft value calculator, it is an even trade if we send #13 and #17 for picks 3 - 6 and that team's 2nd rounder. If we traded up for Okung at #5, for example, we'd send the 13 and 17 to them and get the #36 back. We would then have Friday picks at 36, 49, and 79.
I really think Okung is the only player worth trading into the Top 5 for. Zoners who want to trade up for a safety (Berry) have a little too much space between the ears. Who the hell trades up for a safety???