Just found this thread. I bought OWC ram yesterday for $126 with warranty. Before ordering I called them to see that the difference was between OWC and NuRAM -
here is what they said
In essence OWC is a private labeled major brand and NuRam is private labeled generic RAM. OWC has advanced replacement - they send you replacement ram while you send in the defective ram. With NuRam they must receive and inspect before the replace. Both have life time warrantee. Also, the rebate values change - and go down. It was $32 last week and $25 this week but the price of RAM also dropped. Best to sell older ram on ebay for nearly double - but after you are sure the 'new ram' works for a week or two.
After reading all the above I am so glad I didn't go cheap and went with OWC. But like anything else you pay your money and take your chances