Fuji Press film of various speeds are generally finer grained then others of the same speed except at 800 where Kodak Portra 800 or Fuji NPZ are finer grained. Fuji press film has exceptional latitude, gives good natural colors and easy to work with in mixed light.
Agfa RSX II is an ISO 50 film that provides good natural colors, very good latitude and very fine grain.
If kept frozen, then I would not have any reservations of shooting them except possibly the 1600.
Here is an example of grossly expired film that has been kept in a hot garage in Georgia. It is an ISO 125 film but results indicate it is best to shoot at ISO 64 ~ 32.
Link to larger ->
http://www.fototime.com/06C423C68E76028/orig.jpg
This one is grossly expired Fuji Superia 1600 that was also not kept in a freezer. It benefits from shooting at slower speed.
Link to larger ->
http://www.fototime.com/104F97076DE3899/orig.jpg
Of course if you are shooting a critical event, it would be wise to test a roll before it.