I would absolutely trade both of them if the value was there. There are so many power forward options available that neither is a need. Be it a big-time free agent like Love, Aldridge, or Monroe, trade options like David Lee or Taj Gibson, or placeholders from our own roster in Bass and Jerebko (not to mention Crowder in small lineups), there are many ways for the C's to fill that role, several of which are upgrades over last year's production, and those that are wo't get in the way of long-term planning.
That's not a knock on either player -- but the C's need an upgrade at most any position, and PF is the easiest option to fix. If another team has salary limitations, either Sully or Olynyk could be a nice add.