Kevin Bieksa, Christian Ehrhoff (pipedream), Sheldon Souray, Matt Carle, Tomas Kaberle, Francois Beauchemin, you have company among top four cap casualty candidates...
After searching one of my favorite sites : Cap Geek (<- Must bookmark). Another potential top 4 defender finds himself on the chopping block. Ian White. First mentioned in the RFA portion of the Free Agency Primer (check it out!) Calgary is only 400K below the cap and White in an RFA who will likely command more than that. A midseason trade from Toronto, he spent the better part of his time with Calgary paired with Robyn Regehre and compiled the following combined line
13 Goals 25 Assists 51 PIM. Looking for a fresh contract, I'd expect he'll be in the 2.5 million dollar range. Too rich for Calgary unless they make another [terrible] drastic move.
We have our own version of Ian White in Anton Stralman, but White is more polished and can eat more minutes. Watching Stralman throughout the year his play waned at times. If we make a move for a player like White, I don't see Stralman fitting in the mix next year.
I'll allow you to do the side by side comparison of the two to see if it's worth a little extra coin for a guy like White.