Have not dealt with Negri, but I can assure you'll get your phone from Newegg FAST. Personally, if warranty is the same, I would go with Newegg, once they have the model you want.

Warranty wise, I doubt you'll get manufacturer's warranty from either. You'll have to buy "international version", which cost more, on Amazon, for example.

I've seen somebody on this forum saying that Negri ships your phone back to Hong Kong for warranty repairs.