Lots of options here, these guys give personal insight based on experience. Ultimately read, learn and listen to make a decision. Your wallet depends on it, personally I think we all need a little bit more Cowbell!
Seriously though, every time I get a new bike I try a different system and I haven't been disappointed yet. Might do the 2 into 1 next go around.
Speaking of new bikes . . Nothing was changed on the 2015 SG/SGS except colors.