We'd need more info from you. There are a lot of good cameras.
Do you want a dome or a box camera? Do you want Megapixel or not (and if so, how many MP's? 1, 2, 5, etc)? Do you want I.R. built in, or are you adding your own external I.R. illuminator? Do you need it to be vandal resistant? Do you have a preference for sensor size (1/2", 1/3", 1/4", etc)? Do you need to have a camera that will allow you to change the lens out? If not, do you have a specific field-of-view requirement? Do you require POE, multiple streams, H.264, onboard SD card, or any other specific feature on the camera?
And most importantly, what is your budget? Otherwise, I could just tell you to buy a Pro Series Avigilon camera or something like that But if you are looking for a good bang-for-your-buck, I think that Vivotek is decent. If you have a little more money to spend, Axis is nice, too. It just all depends on how much money you want to spend and what your requirements for the camera are. It also depends on what VMS you're using, as you need to make sure that the VMS supports the camera that you choose.
Oh, and I would stay away from wireless unless you absolutely have no other choice. If wired will work for you, then you shouldnt even be considering any wireless camera.
Dome or Box, doesn't matter. I.R needs to be built in. Don't care for MP, budget is 250 or under per camera. No other fancy features or than it being a network camera that will work with i-catcher.
Preferably Amazon, as I will be needing the 1 day shipping speed (prime). I'm only out there for a week helping out with the cameras so It'll need to be there.