montreal
Go Habs Go
Keep in mind, Montreal 's 2nd is likely to be top 40 or so, Boston's first might well be #25. Still doesn't make sense for Boston but also doesn't get Montreal much value for a rental and their last retention slot.
If you were a boston fan and found out your team made that trade for Dvorak who has missed almost 100 games over the last 3 years to injuries and brings one of the most boring games I've ever seen. They are going for a cup, why would they have any interest in him at all. If I were boston I wouldn't want him for free.