It really depends on exactly what you wan tto do with the camera and what kind of money you want to throw at the setup.
Almost ALL of the cameras have a Sony CCD in them. It is the supporting electronics that make the difference.
For "pro" type cameras, the Sony, JVC, Bosch, Etc are all great and very similar. For your purposes a wide angle 3.5-8mm lens would likely be the ticket... Most are 24VDC and have BNC type connectors.
For "bullet" or "lipstick" cameras, the COP, Ganz, Vitek, KT&C, etc are decent cameras and come with plenty of low light color models with LED illuminators and 3.5-8 (or so) varifocal adjustments. Most are 12VDC and have RCA type connectors.
You can easily convert from BNC to RCA with an adaptor (or make up your own cables).
Axis is the industry standard for network cameras. $250 will get you entry level stuff... $2500 PTZ pro stuff.
An entry level 4 camera DVR card will run you in the neighborhood of $300 or so. You will need to run this on a dedicated machine to be happy.
Fo about $650 you can get an Axis 240Q 4 channel "video server" that you plug the ANALOG cameras into and it converts the signal to Digital IP. It can server the video on the network or send it to software in the PC. In this way you can use high quality analog cameras and turn them into netork cameras without spending $700 or so each per quality network camera.
I am an AXIS channel partner... so don't hesitate to ask if you have questions. I know the products inside and out. Many of the "other" network cams use hte Axis firmware. However there are some decent offerings by Canon, 4XEM, Panasonic Etc. I just don't know a lot about them because we use hte AXIS stuff. From all accounts the 4XEM stuff is great.
I also just signed on with a new company that rebrands network and security products (they try to say they make them). Their pricing seems decent but I have not tried the cameras. In any case, that tells me that the IP camera market is about to get blown wide open by hundreds of "Made In China" fly by night businesses. Just like the "bullet camera" market was a few years back.
As for AXIS pricing.... Froogle is a good reference. Provantage sells them BELOW my wholesale cost (as they do most products). If you are interested in the AXIS stuff, that would be the place to look. For all your other needs, digitalssinc.com is reliable and has decent pricing to end users. Another dealer that I do a lot of business with is
http://www.dvrsystems.net Higher end DVR stuff and I am not sure what his retail pricing is like.