Remington 870, Mossberg 500, Winchester 1300, or even the cheaper version of the mossberg 500 the maverick 88 are all fine shotguns. Walmart around here sells the Maverick 88 for under 200 dollars with a 28 inch vent rib barrel and a removable choke. Mossberg 500 and maverick 88 barrels interchange, pick up the 89 dollar nib 18.5 cylinder choke barrel and you have a multi purpose gun for under 300. Butt stocks also interchange, fore stock will interchange if you replace the entire pump assembly. Biggest difference is safety is on trigger guard instead of rear of the receiver. Only thing I don't like about the maverick is, it is Hencho en Mexico. Another option is the Mossberg 590.
Never did care for Semi Auto shotguns, I think the KISS system works when it comes to shotguns. I have owned, or used all but the 590 of the pump shotguns I listed. I kept the 88, because I don't mind banging it around, and it takes the abuse.
[This message has been edited by dennis_6 (edited 07-18-2012).]