Anyone have video sample for 4mp cameras

I purchased several Dahua IPC-HFW1300 earlier this year and the quality was nice, and I've been trying to decide between more 3megapixels cameras, or taking the next step. I found some 4megapixel ip cameras in the US from this place:

http://www.cctvcameraworld.com/4mp-ip-cameras.html

I was looking for snapshots or video samples. I know these are rebranded Dahua cameras. Can anyone share their experience with these cameras? any picture or video samples?