I'm a bit of a case addict so have owned the FT02 and the original O11D plus my system now sits in a Torrent Compact so I think I'm pretty well versed on the pros and cons of each.
FT02 - Amazing case for it's day, by far the best option for air cooling at the time but as you say it's not really suitable for a modern build.
O11D - Lovely case but far better suited to a watercooled build than air.
Torrent - Fantastic cooling for an air cooled build, yes it looks a bit plasticky but personally I can forgive that for the quietness of my system even while gaming at 4K.