Not sure what type of answer you are looking for.  You say that you make boxing/fighting type scenes and that you have a large cast of figures for that, and that is good.  If you have all (most) of the clothes needed for those types of scenes, why change?  I doubt that a pair of boxing shorts really changes all that much.  And most of the changes that you might find would be in color not so much style.  Newer figures have higher resolution skins, however unless you are doing extreme close ups most of that is wasted, and in fact will tend to slow things down as more memory has to be used to hold all those super fine textures.

The grass always looks greener on the other side of the fence, and I am sure that there will be a lot of people that will tell you to get on the forever upgrade path that is Genesis.  But if you are getting the results from what you have now why change?

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13