Of the Browning, I like the 725. Personally, I would buy used and save a bundle. I would either go Browning or Beretta but you might get something else nice used.
I recently looked at a Ruger and it was the biggest piece of loose floppy hard to close crap I have ever held. It was new at Gander Mountain and not near the quality of old Red Labels. It fell open when you levered it and wiggled around in the action and went back easy to the lock but you had to use a knee to completely lock it. They showed it to me as an example of crap.
The CZ's are good guns but feel clunky to me and sometimes you might get one not regulated well.
I would strongly consider a 6 lb 20 ga.
