W.A.
I dont know baout best..but I bought the affordable summner brand video monitor. It came with one camera and a little TV monitor. It was $100 and I've used it evey day for the last 30 months of my daughters life nad it rocks. The only thing I wish mine had was sound as well. So that would be a good feature to look for. I've seen fisher price has one with a handheld monitor, that would be neat. But the sumner worked and still works great with no problems ever..just wish it had sound as well. Good luck searching..the video moitors just give you a lot more piece of mind to not only hear your baby but see them too.