I'm not familiar with it myself but I typed "Mountaineering Cortez 4900 review" into google and got this review

http://www.snowplex.com/reviews/B000FNCQFO/BackpackInterna/

which sounds pretty good. And $65 seems like a great price.

However I thought I would mention that "top of the line ultra light gear" is actually not very expensive. The heavier packs cost more. A top quality ultralight pack might cost somewhere between $100 and $150. But the heavy packs can go for $200 to $250 easily at REI. So don't equate "ultralight" with expensive. It's usually pretty reasonable.