UPGRADING SYSTEM. I have a couple questions.

I just ordered a Lorex 16 Channel HD 1080p Security System Bundles from Costcos. I have a Fasco 16 channel now with night owl 540 line cameras. My first question is will my current cables work with the 1080p system as far as video and power. Also the new system has a PTZ camera. Other than the power which I think is 24 volt will the cable be the same? The new system uses BNC as does the old. I was thinking of going with IP cameras and a NVR but for the price the Lorex DVR I hope will works ok. It would take along time to change all the wires over to cat 5 cables as I have 14 cameras. What do you guys think.