Our system is now a 1-1/2 years out of date, Q-See QC804NVR4Channel 2TB - 2 neighbors have & our range overlaps, so the 4 channel is not to bad for a nice chunk of our corner area coverage
2TB gives ~10days H D 4Channelcoverage.
We haven't really used the IP, once for a neighbor who was out of town, but have no idea what they saw...
It is a "plug & play" to a point, every thing is mouse & menu...camera install would be based on your location (we have eave raceways, so real easy to run the cables.
Our system really works because there is system overlap & a semi alert dog... Not sure I would want to totally rely on 4 channels, & even on 1 recorder...there are always the what ifs...
I would never have dreamed I would want a system... until a vehicle was chased into our car & the police in pursuit had no ID on the vehicle & tried to claim they had stopped being in pursuit on the HWY, ~1/2 mi from our house, and there were eyewitnesses that saw the 2 police cars in our neighborhood 1/2 block from us, right after hearing our car getting crunched...
That night I REALLY wanted a system & we bought right after finding out our insurance would do nothing for us unless we had an police ID on the vehicle that hit our car...& after I had to prove I was NOT in the car (WAS asleep at home when it happened) after the ticket was written as a moving violation with me in the car!
Edit to add resolution info:
Daytime, we can read the license of our neighbors car in the drive across the street (Nighttime B/W resolution is good, but not as high, mainly due to the color limits)
The old youtube on the system that explains things like the notification & zoom features, sold us on it (and the complete system was under a thousand normally...
http://www.youtube.com/watch?v=Lji4ce6gZuI
And it was on sale & with us buying 2 systems we were able to get even more of a break, even though that was 1 1/2 yrs ago...cannot imagine that electronics like this going UP in price!):