Well, not trying to scold you, but you got the cart in front of the horse! The yeast is just as important as the grain, the hops, and the water and yet you are not planning for a healthy fermentation. For any ale you really need a starter for any beer over 1.040. For a lager you MUST have a starter, and a fairly large one at that (the slurry from at least a gallon for a 1.050 lager.)
My advice: never brew without making sure you have enough fresh, healthy yeast. You don't want to spend all that time making a perfect wort just to drop the ball on the most important part of the process .... fermentation! The best made wort will make terrible beer if you don't pitch enough yeast. A poorly made wort can still make drinkable beer if you perform a proper fermentation.