I also purchased the Samsung SDE-4001 system (from Sam's Club) to check it out since I was new to the CCTV world. After I purchased it I realized I needed the 16-channel but thought I would keep it for a month or so and get some good shots at different angles to see if it was worth it. I was inticed due to running Cat 5 cable instead of the higher priced siamese cable for video/audio.
In the end I took a few hours of video and captured many still shots. Overall I was pleased with the quality of the video and still shots. The only way to get better shots would be to use a Megapixel system which would be a lot more expensive. I plan to purchase the 16 channel system (that comes with 8 cameras) and use the domes more for observation and the bullets in the front of the house by the garage to monitor the cars in the driveway. I plan to purchase (2) 2.6-12mm vari-focal lens cameras so I can ID someone at the front and back door even when mounting the cameras at 17' (2-story house). I've attached a couple of photos that I captured. Let me know what you think. Photos captured at 704x480.