The Nightforce NXS scopes are basically bombproof. That is much of what you are paying for. Yeah, the adjustments are also precise and repeatable, but a decent number of scopes offer that. The Nightforce offers you ruggedness and good adjustments. If you need or want those features, the price is reasonable, since it’s probably the lowest priced scope that really offers the highest level of both of those.
I’ve owned that model PST. The glass was excellent, the illumination was excellent, and at 10x, the reticle was good. At 2.5x the reticle was nearly invisible, with or without illumination. Vortex is still figuring out how to make good FFP reticles.
I’ve read that that particular PST was engineered to be as rugged as a Leupold Mark 4. Whether that’s a high or low standard I’m not sure. Even the biggest fans have never claimed it’s as rugged as a NXS, and two seconds fingering both scopes will make this obvious.
I like FFP in higher magnification scopes, but it really isn’t needed for most uses on a 2.5-10x scope. How likely are you to be measuring targets or holding windage at less than 10x?
Adjustable parallax is a mixed benefit at that range. Anything over 10x and I think it’s essential, but lots of 9x scopes do fine without it. It doesn’t hurt, but won’t be missed much. The compact NXS puts the illumination control in that spot, which is a convenient spot.
My 2 cents:
-if you want or need extreme ruggedness, get the NXS
-if you don’t, take a very close look at Bushnell’s Elite Tactical 3-12x44, which has an illuminated reticle option (BTR-MIL) and a nice windage tree option (G2). Link below. This is also a FFP scope, with a reticle that’s a bit too fine at 3x but great from about 4x-12x. Don’t confuse this with the newer LRHS, which is an entirely different scope despite the make and specifications.
http://www.opticsplanet.com/bushnell-elite-tactical-3-12x44mm-rifle-scope.html
To me, having owned both, the Bushnell 3-12 is a MUCH better scope than the PST 2.5-10x32. The reputation of this line and that exact scope suggests that the Bushnell is also very rugged - not a NXS, but as rugged as other higher quality tactical scopes.
-the Viper PST 2.5-10x32 is fine from 5x to 10x, and is nice and light. Not so good at 2.5x. Although, FYI, the G2 reticle in the Bushnell is pretty fine at 3x also.