I like the springfield because it is acurate, it still has good power for a low level gun and because you can actually get other things for it to. ( rifle grenades, bayonette, etc.)
PTRS is the one wiht quickest fire rate, so it is the best one for newbie snipers, who miss a lot, the Arisaka IMO is my new favourite sniper, it has a lot of recoil, slow fire rate, but when you hit, you hit...