I recommend the 870 express, too. Mine has been very reliable over the years (about 13 now).

Just in case your still looking, you may want to check out this link. Once you get there have a look around. There's a few topics on that wonderful express.
[link]http://www.shotgunworld.com/bbs/viewtopic.php?t=11620[/link]

If you are on a tight budget for a little over $100.00 you can buy a single shot Stoeger Hunter or a NE Firearms Pardner (I have this one) in a full choke that handles a 3" shell and kill turkeys quite successfully.

I have done this for a number of years even though I own Brownings, a Beretta, a Benelli, and a number of other manufacturer's shotguns. You don't have to worry about these guns getting down and dirty or scratched and turkey hunting is a one and done type of thing anway.

there is a new remington 870 express for turkey hunting. i have not shot one yet but the look sweet. it is a pump, all camo, 3 inch chamber i think, and has tru glo sites. good luck

For value it is hard to beat a Mossberg 500. You can get one for around $165 or so.

MOSSBERG 835 ULTI-MAG, A REAL TURKEY THUMPER I HAVE KILLED A PILE OF TURKEYS WITH MINE.