Really hard time deciding on trade offer?

No way would I do this trade. Morneau is slightly superior to Sandoval when healthy. Halloday is far superior to Hansen when healthy. Hansen may be great in the coming years, but he's still just a second year pitcher who could easily have a sopre slump. Halloday is one of the 5 best pitchers in all of baseball and he did that while playing for a somewhat bad team in Toronto. Now he's with a title contender in the Phillies and he will face easier lineups in the NL.