i have the 1969 wich is the same compressor unit as the 1968 but with some more added stuff. i have also a pair of distressors e8xs, but no expirience with the ftpro.
however, the drawmer is one of my all-time favourites for buss work, especially on drums. it can - if the matrial is right - very good for master buss duties especially in rock heavy context, too.
i also use it for tracking. vox, bass, crunch guitars etc.
the disessor is - in my small world - the **** for tracking almost everything from any source because of it's vast versatilty. in mixing i use it on guitars, bass, room drums, kick, snare. but, it is in my opinion not really a master buss compressor. i tried it once and it just did not do it for me. i also never heard of anybody using a distressor on the masterbuss.
the tfpro. i have not used that unit, but i read some good things about it here at slutz. maybe do a search.
hope this helps you a little bit.