You might be right on Hjlamarsson, but with 5M left to sign 10 players, they'll have to let Oduya, Timonen and other players walk or trade a player which is my reasoning behind Hjalmarsson or Oduya. They may not trade him, we can't be sure of that but that's just what happens when a team is in cap trouble, they may trade good players with good value just like Boston did with Boychuk, or like Chicago did themselves with Leddy. Add on top of that that he's been mentionned in rumors quite a bit but you take that for what it's worth.
Emelin will be traded I'm almost 100% positive about that, I follow Montreal quite a bit so I can tell you that with Markov with two years left, Beaulieu playing on the top 4 (in front of Emelin) and Jarred Tinordi coming up, they will most likely trade Emelin.Montreal has more than enough defensemen that are younger and just as physical as Emelin like you are insuing and already equally better to Emelin (Tinordi is extremely physical). Tinordi is more than ready to make the jump and Emelin is seeing a more and more limited role with Montreal, won't be a suprise to see him traded.
As for Quincey, he signed a two year deal in 2014, which leaves him as a UFA after next season. I wouldn't be surprised to see him go a the deadline depending on how Dekeyser plays out. As it stands today, Dekeyser has already a more important role on Detroits roster and they also have Kronwall on the left side. I wouldn't be surprised to see him go with the expanded role of Dekeyser and especially if the defensemen market stays as good. By giving him only 2 years, you have to think on how much they really see him in their future plans.
I think you understand that not all of these defensemen will be traded, these are not facts but just options that could happen, these players could very well not be traded but out of the 9 defensemen I named, I am positiive that some of them will change teams at some point either this summer or next season for different reasons. Some for performance reasons, some for cap trouble and some because they are just expandable. Again, not all these players will move, but some of them will and it's why I wrote might.