I am shopping a new 12-gauge semi-auto shotgun and I have decided to go with a remington based shotgun off of my good luck with my first shotgun ever, an 870. I want a camo gun so I'm looking at either the Super Magnum or the Sportsman. The only difference between the 2 guns is that one has a [28" barrel and a 3" chamber] and the other has [26" barrel and 3.5" chamber]. I want the Super Magnum but I have only shot 28" barrels.

So my questions are...

1. Is that a good gun (price range) compared to the Browning Gold/Silver, Mossberg 935, Franchi I-12, Stoeger Model 2000, and the Beretta Urika?

2. Is the gas system better than the inertia systems?

3. Does the difference in the 28" barrel and the 26" barrel a noticeable difference?

4. Will the 11-87 Super Magnum shoot ALL rounds? Does it shoot the lower brass shells? I heard someone say the gun comes with 2 O-rings that can be swapped and both shells can be shot...I dunno...

Thanks for time to comment!