And unless the customer service has changed that's pants as well. Do Xvision still have a 0898 technical support number?
As Al yeti suggests Hikvision if you want something decent, if you are on a budget Security Warehouse will have something, that suits your budget. I would suggest vari focal lenses if you are not sure of the field of view 4.25 is quite wide to view the front door area, plus think about what you will see from above the door you don't want to get the tops of peoples heads, the face is the most important part.