mmatarella

I am looking for a quieter camera for my two indoor locations. The Swann cameras, the SR PRO-615cam, is a bit too loud for nanny camera usage. There are times when it flips back and forth several times when the lighting is borderline. It makes a very heavy click when shifting between day and night vision. I assume it's moving a filter. They are fine for my outside security locations but need something for inside that won't create such a racket when the grandchild is asleep. The DVR is the Swann SWDVK-1632N8-US 16 Channel 960H DVR. I'd like something of similar resolution to the 615's. I can give up night vision if necessary, would be handy if they ran on same voltage & cable so I could use the Swann power and cable I have in place. Pricepoint is part of the decision, would like to stay under about $50.00 each if possible. Thanks in advance for any advice. Mark