i have a pair of these and they work great for my commutes (briefcase, change of cloths, work and riding rain-gear, safty-vest, etc). there is space enough for grocery shopping after dropping off work items.
i toured with these as my front panniers (a little too large, but do-able) in 2004.
i use a nashbar rack-pack as well (lunch, night lighting, tools, mini-pump, lock. etc).
i have used nashbar bags etc since 1980 and think (if we are talking about the same bags) that you could be well pleased with this set!
ride safe!