Your gonna need another 150$ set aside for internal gearbox upgrades. FPS alone doesn't mean squat if you have crappy internals.
And sniper rifles are purpose built weapons, what your making is a DMR

So your still attached to a squad, and fill the role of a normal rifleman, but with more accuracy.
I suggest saving up for a gun that comes with a metal body, because it's MUCH cheaper than buying a metal body later on (since you can't sell a plastic body to get any sort of refund).