Tough to pass up Pence there. With that early of a pick I tend to err on the safe side, and even if Pence doesn't run as much he's still a good bet for 20+ HR, a great AVG and plenty of runs/RBI. Bruce will probably - almost definitely hit more HR but he might also hit .250.
I tend to be a little more conservative and go with Pence here. Bruce may have more potential, but Pence should be able to produce across the board, giving you a better avergae, more runs and about 6-7 more steals than Bruce.
Bruce is always lurking with that "40" HR power so if you are more aggressive, you can role the dice on it, but your first two picks give you a strong HR/Power base already and I would I would be a little concerned that with Bruce and Kinsler, 2 of your 3 first picks could possibly be hitting .260 this year. Don't love that idea.