CFLs use the same base your regular house lights use, so no need for a different base. Just screw in and turn on. The biggest one I have been able to find at your regular department store, like Wal-Mart, is a 42w bulb and pushes 2800 lumens. Its made by GE and is about 5" long from head to toe. Cost like 5-7$. Use the ones rated at 6500k for your vegging area.
Oh, I would go for setup "A" also. Seems that it would give you room for play if your flowers start to go amazon on you.