Don't buy a Rift then Storch. Rift + DCS = your kids saying "mommy, why does daddy have that thing permanently attached to his head, and why does he ignore us and the world for 15 hours a day".
I've flipped that on its head at hour place, when we get nieces and nephew guard duty, I put the Rifts on them whenever I need to be doing other things - keeps them entertained for hours straight.
Minecraft, the kids don't move for about six hours (until we drag them away) if I put that on the playstation for them. I've even had "I wanna play Minecraft" temper tantrums.