London drugs has actually been stepping up to the home security camera market lately, I have used many many types in commercial applications over the years but in all honesty the "best" are simple black and white Cams with the brightest IR illuminatlon you can find... Bigger diameter = more IR LED's = better night vision
A computer based system is what I have... Just a simple capture on motion activated recording program that only records when someone enters a certain area of the cameras view...
Be aware tho that not all is cosher when it comes to cameras... If they are pointed off your property people seem to get upset... Especially when it's a x40 PTZ under the 2nd floor eves of a commercial building next to a hotel
.....and there was that one time a lady ran infront of a camera to prevent being raped (that dident stop the attack)... Only to later find out the camera dident work... So she sued the guy who had the non functioning camera....
We won't even get into "seizure of evidence" if the cops want a reason to peak into your home...
....a webcam in a window with the right software can be a cheap alternative