It is going to be hard to give advice on chicks. At this age your looking to cut any that do not have 5 toes, dark skin or straight combs. Other than those things if breeding and/or showing is in your plans I highly recommend you try to grow them all out until 7 months old to make sure you are not rehoming any potentials for breeding or show winners. If breeding what colors are you going to focus on? Will you have space to divide different colors into breeding pens? Mixing color for breeding can be an issue if you want to show or for the chicks to have show potential. Answering these questions might help to decide a few more that can go because they don't fit in your breeding plans.
Thank's for that good advice! I'm starting to do silkies also! I just have to get my hand's on some good whites, and showgirl's.