I think you could absolutely realistically get a 1st round pick and more for Allen, but the ONE thing you couldn't get from a team is a young up and coming DE like you wanted (for an older one). That is something no team would ever do.
Honestly just trade Allen to a team that needs him (half the NFL) and take a 1st round DE (Coples, Paige-Moss, and Brandon Jenkins should be the best rookies by far if your NCAA class is built correctly). If Quinton Coples isn't incredible in your draft you should edit him because most analysts have him as almost as good as Andrew Luck (he is a LE if you don't know). Coples will be better in his rookie year than any of the current rookies will be their 2nd year.
Ponder obviously went in the 1st round, most people thought he was overdrafted but he is certainly worth at least a 2nd round pick maybe a 1st rounder if it's a late pick or you throw something in something small. Kind of sucks, but it's a pretty universally panned pick - who knows though maybe he ends up being great /shrug.
Oh and move poor Kleinsasser back to FB where he belongs so he doesn't sit at 3rd string TE

he is SUCH a good FB and his career is almost over, he REALLY helps AP. D'Imperio doesn't deserve to start over the Sass-man.