For gas piston rifles, the biggest area of concern would be when you start changing hand guards. You would have to insure anything you buy will fit over or around the piston and gas block area. The Adams may be alright, but I'd take a look at their warranty before I dropped my cash. A one year warranty and a lifetime service warranty trumps a one year "maybe we'll cover that" warranty every time. Going with a S&W in any configuration means you can use just about any aftermarket part on the planet, with few if any proprietary parts to deal with. Aside from the forward assist and dust cover, the Sport has everything you need, nothing you don't.
Good Luck and good shooting.
