I have a hunch the OP had no interest in flipping McDavid now that he's acquired him. I may be wrong but his "ESHHH" comment suggested to me that he wasn't a fan of the return despite getting Kane/Price.
Give me McDavid in both cases.
As you already have Holtby, you argueably have one of the top 2 tenders in the league. Now you argueably have the best forward for years to come.
Hedman, like the rest said, is far more name value. Have never really been a fan from a fantasy perspective. Kuch and Matthews are fantastic assets, but McDavid blows both either away, and while you probably don't replace the other with a similar asset, you could probably find a very good 60-65 point forward (add 20 extra points for McDavid and the quality/quantity doesn't really negatively impact you all that much.
I like! You may be crazy... but I like the way you work! YOU GOT YOUR PLAYER! Let the rebuild begin.