Hello, I just purchased 2 cameras: ordered 2 HPX170 but received HPX175. I did some googling and searching the forum, and turned up nothing stating the difference. The ebay seller has 26,000 instances of mostly positive feedback, and ebay sale was for 170, not 175...so if it really matters, I could probably have a good case to return it. So called them and they state the only difference is that the 170 is NTSC only and the 175 does both PAL and NTSC. After seeing some of the cautions about grey market items in other threads, I decided Id better turn to the forum to make sure its fine, or promptly return the cameras and start over. On the other hand, maybe there is no functional loss with the 175. Anyone know anything of the difference, or can point me in the right direction? Thank you so much!