Well for that budget I would rule out the Remintons now, I have a 1100 and 11-87 and wouldnt buy them over again. I would look for a used Beretta 391 or Benelli M2 or SBE2 but they may cost a little more. But if new is your style CZ is tuff to beat these days man. Very nice looking at a good cost and they shoot very well for the price.
http://www.cz-usa.com/products/view/cz912/