Thanks for the replies!
I'm in the UK and while we do have Costco, what they stock is different.
Either way we don't want to spend that kind of money all in one go. We would rather buy just 2 cameras, then eventually get a third and a forth.
I'm seriously considering these... http://www.aliexpress.com/item/Hikvision-3-0MP-DS-2CD2032-I-1080P-Outdoor-IP-Camera-Full-1080P-real-time-image-30/2019749242.html
Can anyone give me any reasons why not to get them? There's so many cameras on the market and choosing a decent model at a reasonable price is trickier than I thought. I have seen recorded footage from these cameras on YouTube and I was impressed with the quality in both day and night. Some videos did look better than others though, is that down to the recorder/NVR settings used?
Also the NVR of choice at the moment is the Hikvision DS-7600NI-SE(/N). Does anyone know if this actually allows you to add an audible alarm/siren? Some places say yes, some don't mention it.
If anyone can think of a better NVR for similar money then please let me know.
Thanks,
Chris.