I bought a Mono M80 recently and I'm not very impressed with it. It's not as solid as I expected, there are plastic strap clips, the neck cradle is too soft, the handle doesn't feel as stout as I'd like and it's not the most comfortable to carry on the back. Storage is well designed and plentiful and I bought the Tick bag 2.0 with it to expand further.
I moved on a Fusion Urban when times were tight and sorely regret it. That was a brilliant bit of kit; no corners cut at all and just so reassuringly tough. Storage was excellent too although the option to expand storage in a similar way to the Tick for the Mono is far more expensive. The Fusions seem to be hard to come by these days.
Interested to hear other views/comparisons/preferences.