Well, we went with the Arlo system. Nice thing about it is that it is 100% wireless. No power cables, no wires to connect the cameras, etc.

The iPhone app seems to work well, too. Now I just have to set it so it doesn't send me a text message every time it detects motion. Pictures are amazingly clear.

FWIW Best Buy is having a sale on the Arlo. We initially wanted 3 cameras but they had a 4 pack for $499 and we had a $50 coupon on top of that. Normal price for a 4 pack would be about $650.