In another season or two, where are you looking to fit Athanasiou, Nosek, and/or Bertuzzi? All of them look like NHLers to me, and that's without bringing up guys like Holmstrom, Ehn, or Turgeon who could still develop/surprise and push for roster spots. Not to mention the Russian we just drafted.
For possible price tags, Abdelkader and Helm are guys we could most likely replace from our prospect pool and who would garner a nice return in a trade. If you're high enough on Glendening, there's even an argument for moving him up to the third line center spot and then backfilling the fourth line, which becomes even easier.