I ordered a FAR 50, but it hasn't come in yet. Does this suffice? Or should I buy another 'tack' driver to qualify as my 'sniper' rifle?
The FAR-50 has a hand-lapped target barrel, and with optional match chamber, has in fact the same quality barrel as on an $8000 EDM Arms 50BMG. The question of whether or not it is a tack driver in the right hands is certain; it is very much so.
However, this will likely not be a rifle you will be able to shoot well, unless you are an experienced shooter. I have talked to a few individuals with 30" barrel models, and the recoil is similar to a 12GA slug gun, or a 375H&H magnum. You will find that at these recoil levels, it will be quite a task for you to shoot it well at all, and you probably won't be fond of it for a precision rifle.
To get the most performance from this gun, you MUST handload the ammunition with high-BC bullets. Those are about $1.75 and up, just for each projectile. These bullets are going to show off their abilities at over 1000 yards, a distance most people do not have access to. At 600 yards or less, it doesn't make much sense to use.
So while there is nothing wrong with getting a 50BMG before it's too late, I just want you to know beforehand, it may not be your cup of tea once it arrives.
I would say that instead, learn how to reload, and buy a Savage F-Class rifle in 6.5-284 Norma. A bolt-action is going to be your ticket to precision, along with lots of shooting practice.