First - as has been stated, don’t call a precision rifle a “sniper rifle.” This ain’t Call of Duty and you ain’t Keanu Reeves. Unless you’re employed or enlisted (in which case most still aren’t titled “snipers”), you’re not a sniper, and your rifle is not a sniper rifle. You wouldn’t call yourself a soldier just because you picked up an AR-15, so don’t take that honor away from folks who actually DO live behind a longgun to protect our way of life, and equally, don’t paint yourself (or any of the rest us who shoot long range) with the same brush as the naive gamers who only know firearms based on game specs...
Neither of these should be on your list.
Remington is out of business, and the company which bought the brand name is comprised of deviants with a history of failed ventures, with no experience actually building and servicing firearms yet. Buying a Rem 700 today means you’re either buying an old rifle without warranty support, or you’re buying one of the first guinea pig rifles the new company kicks out, which honestly aren’t expected to be anywhere near worthy of the Remington legacy.
A DD gas gun is asking for a headache. It can get there, but the work involved is higher and magnitude of success in doing so is lower.
There are too many prettier girls to dance with than to pick up either of these with their respective boat anchors attached.
The ONLY thing going for your DD is the fact you implied you already own it. Maybe it’s a 20” or longer barrel, maybe it’s a mil-clone carbine, you haven’t shared that detail, so maybe it’s almost suitable, or maybe it’s completely the wrong animal. If it’s a long barrel, heavy rifle, with a float rail and a quality trigger, and a sufficiently high magnification and quality optic, sure, go bang away because it only costs you ammo.
And in parting - “eventually 1,000 yards” should only be a matter of finding a 1,000 yard range and going.