The Link Removed is a Glock clone by S&W chambered in .40 S&W. It's striker fired, has a 4-inch barrel, and 14+1 capacity.
Given the choice of quality self defense ammunition, there is no such thing as "best." Federal HST, Speer Gold Dot and Hornady Critical Duty are all good options. 180 grain JHP rounds have typically the largest expansion, while lighter rounds (165 and 155 JHP) have typically more energy.
The most important issue is that you need to make sure that your self defense ammunition feeds reliably in your gun.