im gonna put in my 2 cents.
I recenently bought a new mossberg 500 20 guage youth model and it came with 3 chokes and 2 barrel. one rifled one smooth. I got the youth model for the compactness. love this gun. paid 350 $.
now I am going to try dove hunting sunday with it but for rabbits and squirrels ill use my marlin model 60 .22. I feel I am a good enough shot to where the .22 is sufficiant.
what ever you choose just have fun and be safe.