It's not just my machine then! I bought the a NH900 yesterday, and have also found the recorder's display hard to read - it's not the size so much for me, but the background is so dark. At first, I was relieved to see you could adjust the contrast, but that doesn't make any difference to the visibilty. I've been contemplating exchanging it for an NH1, which appears to have the equivalent display on the remote, but I prefer having the option of a dry battery power supply.
Of course, now I've seen this thread.