I personally like Hikvision. Its cheap and works well. Just buy from a reputable distributor so you don't get the chinese firmware. Nuvico makes some decent stuff too. Flir is another to check out but I'm not a big fan. Honeywell, GE and Geovision make a cheaper line of nvrs and IP cameras. I have not used them much. Speco makes a good product too. The one thing about the camera market is their is no shortage of products to choose from.