I think you have to take this trade since you'll be golden in net with Thomas and Lundqvist - since your goalie stats can hold back your offense. You'll get some added depth with Pavs, but kinda sucks that he's not taking many faceoffs right now.
Sedin and Kopitar will be good for you - I say keep this offer on the table and try to maybe go for a less caliber but solid goalie and get some upgrades in other areas of your offense. Even throw in Harding and get another player out of it. Lundqvist is good, but I think you can get more by maybe going for a Niemi or Quick kind of goalie instead.