You know all you need to about the guns if you searched around. Does it fit you? Have you shot one?
They work fine. I have the 3500. Buddy has had a 2000 for about 8 years. Loves it. Splurge on camo, if you don't have a camo gun. Why not?
Whatch out for the ones at Dick's. The only have 3 chokes, instead of the normal 5.
The new 3000 is more like the 3500. Has a few more goodies. Stock shims, for one thing, that allow you to adjust the stock. I did on my 3500.
The 3000 is also heavier than the 2000. One of the best things about the 2000 is the sub 7# weight