IMO Pantac and Flyye stuff is pretty solid but nowhere near the quality as say Eagle or Paraclete. That said it's sturdy enough for every day use IMO and it's not like you're in some super harsh environment.
Also look into some of the condor bags.
This one may be a bit small for you (if you overload your bags and need the capacity) but it's a great moto pack and you can tie it down with the vertical straps on the back to make it more aerodynamic so it's not flopping around everywhere when you're riding.
http://www.condoroutdoor.com/126medi...ssultpack.aspx