New to the forum and to CCTV.  I need to install an outdoor surveillance system. I  will be using an 8 channel DVR and initially install four cameras.  Here are two systems that have been recommended.   
  
Veilux DVR                 SVR-824DVD   500 GB Hard Drive 
Veilux Cameras           VV-70CDNL2812D 
Veilun Power Supply    VPS-24910  
  
CCTVStar DVR                SSA-0824T   1TB Hard Drive 
CCTVStar Camera           SVD-700SI2812D5 
CCTVStar Power Supply   AC24V09P 
  
I would like to install the power supply in the attic, 130+ degrees. Some have told me that it is too hot. Also, I have heard that Korean is better than Chinese manufacture.  Any truth to this? Opinions on these systems or advice on other products appreciated.  Thanks in advance.