When I went to purchase my first 12 ga. I was looking at the BPS myself too. When playing with it in the store, I notice that most about it felt cheap. A friend and the clerk at the store suggested that I look at the 870 Express. Better price, great action and feel. I bout it as my "universal" gun. Changes in chokes and loads I can shoot anything in Ontario from Clays to Birds to Moose (Ontario = heavy brush = short range shooting). The express super mag combo was a pretty good deal in that you get rifled deer barrel for slugs as well as smoothbore for birdshot. It can also handle 2 3/4, 3" and 3 1/2" shells.
As for the BPS, I did like the synthetic stock better than wood (durability) but the pump action bars felt cheap and wobly with too much play in them. Felt like they were going to break on me in the store. Browning has a good name for their fine double guns, but you pay for the same name in the cheapo pumps too.
Either way, I suggest try before you buy. But I still recommend 870 all the way. If it is good for hundreds of thousands of police officers, it is good enough for me.