[pct-l] Pack - GoLite vs ULA

[b j]

Hi There,

I'm deciding on a pack for the trough-hike this season.  I've heard some mention the GoLite series and they've just reduced their prices http://www.golite.com/packs-and-luggage/backcountry-ultralite even further.  What's the downside of a Jam Pack versus ULA Circuit or Catalyst?

I know it's somewhat personal to fit, style, etc. so don't worry about that -- I'm more interested in functionality comparisons.

Thank you in advance for sharing your experiences,

-Rhiannon