The barrel in question is the one DPMS uses on the .260 Rem Lightweight Hunter. If it had a PTG reamer run through its breech, I personally would never buy it, but I wouldn't buy a production barrel for .260 Rem in the first place. For your purposes and budget, it's probably more than adequate, but I don't like probably when dealing with barrels.
I had GA Precision do my last .260 Remington AR barrel, and it's one of the most accurate rifles I have ever owned.
As far as terminal ballistics are concerned, the .260 Rem trashes .308 and is more comparable to .30-06 in terms of retained energy, which it also will out-perform.
For large game, literally millions of moose have been killed with 6.5x55 Mausers in Scandinavia, and .260 Rem is hotter than that cartridge in its legacy form, pushing the same bullet weights.
Hit probability is much higher with a .260 Rem than a .308, and flight time to target is shorter. Wind drift is a different world with .260 Rem, as is trajectory.
.260 Remington with a 129gr premium hunting bullet will beat a .308 165gr premium hunting bullet by 275yds for retained energy, with faster impact velocity throughout the flight path, meaning better expansion threshold advantages no matter what the range is.
The idea that .260 Remington isn't adequate for big game simply is refuted in numbers that exceed scientific baseline standards by factors measured in exponential numbers, not a few decimal places. On top of that, you have a little less recoil and very pleasant shooting rifles, that also have the capability of reaching out into ethical long range hunting. No long range hunters I know would even bring up .308 Winchester in a serious discussion about caliber selection.