I have a bit of experiance with CCTV systems. Although its not my bread and butter Ive dealt with a 20-30 camera system covering a factory with avermedia cards at the heart of the system to a simple USB webcam for a small office.
I have found webcams are just not cut up the job. Option 2 is possible if youve got someone who is decent with electronics, Ive got someone that can change the LEDs for me, unfortuantely most cheap webcams dont automatically swich between having this mode on or off, so you end up having decent night footage, but white out footage in day.
If your happy to switch it manually all the time or can find one that can switch it over automatically great, if not, get an actuall CCTV camera, these are my suppliers of choice.
http://www.sctltd.co.uk/acatalog/Day_Night_Cameras.html