I keep hearing how great Doran's Shield is.....
but is it really? I even switched back to Doran's blade to improve my CS numbers with Vladimir. I got 174 CS in 20 minutes last game thanks to the +8 attack damage included with Doran's Blade vs the +5 provided by Doran's Shield. While it might not seem likely, the additional +3 attack damage makes a huge difference if your champion has the lowest attack damage at 48 and makes it possible to farm under turret.