Another bino, the same company ....
Hello
I don't know anything specific about the bino you are asking for, but there is a rather elaborate review of another Celestron bino, the Trailseeker 8x42:
http://www.birdforum.net/showthread.php?t=280201
I admit that I haven't even got to the end of that thread yet, but I gathered that the owner encountered rather many quality issues. Incidentally, I have the same model and I am rather satisfied with the optics, but mine started having a loose hinge after a short while, which is not good. I'm sure I could send it in and get a warranty repair, but as it's my only bino I'm not going to do so before I have another.
Important to know: The Celestron Trailseeker costs about 250 Euros (in Europe, probably cheaper in the US), so you can hardly expect the Celestron Nature to be any better in terms of quality - rather the opposite.
There is another model you might consider though, that is the Vortex Diamondback, which I think would be inside the limits of your budget. It has a good warranty, very good specifications (FOV, eye relief, close focus, weight). I have never seen it in reality, but from what I've read the optics are rather good for the price, though the image may have a yellowish hue. Whether you like the look and feel of that bino is a personal question - if you see a picture of it you'll know what I mean.
Just in case you do not know AllBinos' website yet - it's certainly worth having a look there. You'll find articles, reviews and rankings:
http://www.allbinos.com/rankings.html
But it's always important to remember: The bino has to suit
you - so try before you buy. Also there seems to be great variation between one pair and another, even if they are of the same model.
Elu