[pantulis]

My issue with Arc is the non-macness of the UI. I find it a great design exercise but is not exactly what I expect from a Mac app.

Orion is much more interesting in terms of UI and also in performance, but I have to say that tab management on Arc is superior, as it has the concept of "folders", not only nested tabs. Orion has something like this planned, but there's no clear date.