The top of the poll says tactical Pump so I want a pump. The only reasons I can see going with a semi are; injured hand, detachable magazine.
I dont have much money either so my choices are also budget influenced.
I thought about the norinco 870 ripoff because, after market support is there (most parts interchange with 870s) by most accounts the norinco is also well made.The norinco also has one of my most expensive must haves, ghost ring sights, but its a Chinese made ripoff of an American product. I choose not to support china whenever possible.
Given my price range my favorite choice is out the 870 equipped with Ghost rings its out of my budget and, dose not come from the factory in that configuration.
Mossberg has a alot more options and the ghost rings are far less expensive. Right now my dilemma is save for a 590 special purpose with 8 or 9 round tube and the sights I want for $400ish or a used 500 with a fixed 5 round capacity for $200.00 out the door.
Some time down the road I will have to Vang Comp any defensive shotgun I get. A 500 5 shot with ten more yards effective range with buck would beat the heck out of the most tweaked 870 with out the VC barrel.
Last point in my decision making process might be instant versus delayed gratification, meaning I can get the 500 now. I might still hsve to see what the next gun show brings.