I'd keep Subban too. It looks like you have a well balanced team and the trade is not addressing a weak spot. Chances are you'll lose value overall when you dilute your teams talent taking a 2 for 1 unless the 2nd player is replacing a weak link in your roster.
16 team H2H keep all - 1st Place in 2010-11
C: Datsyuk, M. Koivu, Krecji, Cervenka
LW: Parise, Franzen, Skinner, Glencross
RW: Pavelski, Marchand, Brunner, Shaw
D: Byfuglien, Phaneuf, Burns, Carle, Keith, Martin, Beauchemin
G: Lundqvist, Halak, Backstrom
Prospects: Hackett, Murray, Bjugstad, Poulin, Vatanen, Rattie, B. Nelson, Fasth