I would choose Smith/Quincey because Smith is the best player out of the four by far.
That being said, I would rather have Colaiacovo over Quincey. Cola moved the puck well the three games he was healthy and the Red Wings defense lacks that skill overall.
I disagree. Smith has the highest potential of all four, but he's not the best player (yet). Smith gets absolutely exposed every time he plays against speedier teams. Remember that game a couple of weeks ago against Nashville? The one where Mike Fisher absolutely owned Smith so badly that they did a montage of it during the broadcast? That's Mike Fischer mind you, not some superstar and he ended the night with a goal and two assists. Smith and Quincey are AWFUL against a moderate forecheck. So again, against a slower, bigger, team then maybe they'd be the better choice. But against a team that forechecks, White and Colaiacovo are far and away the better option as far as retrieving the puck and getting it up ice to the forwards.