re: Brine, inject, or both?

I use Alton Brown's:
Gallon veggie broth
1 cup kosher salt
1/2 cup brown sugar
1 Tbsp pepper corns
1 1/2 t allspice berries
1 1/2 t candied ginger
1 gallon water
Ice

boil everything (except ice) until ginger desolves, about 10 minutes. Cool in fridge until cold, then I put turkey in a clean 5 gallon bucket and then poor this on top and cover with ice. soak for 8 to 18 hours... no more than that or I've heard it will get too soft.
EDT: I smoke mine with apple wood at 225 until the deepest part of the breast gets to 165. Let it rest for about 30 minutes.