I think you made a good choice. On the ULA web site, it lists the main body compartment as 2600 cubes and just over 2.5 lbs (43oz). Not quite as huge as one might think if you're not using the exterior compartments to their capacity. While not super ultra light, still reasonably lightweight and that pack should do everything you would need it to do.

I have an older ULA pack and love it. I got very lucky one day on the Whiteblaze site. A guy was selling 2 used packs. One was a GG Vapor Trail and the other was the ULA. I had norrowed it down to these 2 packs and couldn't believe my luck. I ended up getting a great deal on both packs and got a good opportunity to compare both side by side. Both good packs, but I like the ULA a little better. I think they are a very well made product.