Since Kenny tried to get Edler it's obvious that he could be looking at some help on "D".
If Boston wants some help od offense (Alfredsson/Iginla for exemple or to keep Horton), they could be trading some players such as : Rich Peverley, Chris Kelly or Johnny Boychuk (per James Mirtle) and we could also add McQuaid. I don't think that they will move Tyler Seguin so they are going to move someone else.
One player who could help us is Johnny Boychuk, RHD with a big shot, big hitter, can play on PP and PK, with a $3,366,667 cap hit for another 2 years... They could be looking for some picks/prospects since they might need to shed money.
Another player who could be also nice pickup is Kelly as Helm replacement.
What would be the asking price?
Kronwall - Boychuk
DeKe - Smith
E - Kindl/Q