Newer won't necessarily equate to better glass, but price definitely tends to. By "better", I personally mean giving me the ability to peer into shadows better, and give me the ability to clearly see and shoot targets as early and as late as legal shooting light allows. Glass quality and various optical coatings are a huge part of that.
One of my great frustrations of having really dug into Rokslide the last year or so, is coming to the difficult acceptance that most of the scopes with the best glass are also just not very rugged. This is immensely frustrating. If you haven't dug into the drop-testing threads, it'd definitely worth doing so. Setting aside how well a scope handles being dropped, it's pretty hard to beat Leupold's HD glass, and the VX-5HD is probably the single best value in a scope out there, between price and optical performance.
That said, you should ask yourself what your tolerance is for checking zero before a hunt, and whether or not losing zero is acceptable to you if you drop your rifle, or it takes a hit somehow. As to the scopes that do really well in the drop testing, it seems the Maven 1.2 2.5x-15 is probably the best value around right now, between rugged durability, optical quality, price, and reticles. Nightforce scopes are highly thought of here, as are most of the Trijicons, but I don't know which particular models. That info is in the drop-test threads though.