A lot of the decision depends on how the truck is used, where you drive/travel to and how concerned with reliability you are. If it's a truck you put your family in, drive cross country or long distances away from home, and can't afford to have broken down "in the middle of nowhere", building in some redundancy and having higher reliability OE type parts might be the way to go. If it's a toy or you're more worried about making power and can tollerate some reduction in reliability, going the "big aftermarket" route might be best.
You should have no problems supporting 190s with a good regulated return and a good stock pump. Feeding the stock pump with a low pressure AirDog or FASS adds a level of redundancy (2 pumps, stock pump not working as hard, additional filtration, Air Removal, etc) and will help to suppport the increased power level. If you don't want to carry a spare pump everywhere you go, staying with a stock pump leaves you with the ability to throw a stock replacement from any ford dealership in the truck if you do have a failure while away from home.
In short, biggest isn't always best. Consider how you use the truck and what's most important and pick parts that fit what YOU NEED. The A1000 or a big Fuelab are not "one size fits all" and are not ideal in many situations...sometimes there is a good case for using a stock pump.