I ride in a swinging fender and I can still jump in it if necessary, I also find that my horse enjoys it better when I ride in it. I forgot to bring my dressage saddle to an event and only had my fender and I managed to score my highest ever dressage score in it
It depends on what discipline area you want and what your looking to do with your horses.
Western saddles are mainly for treks and hacks where English saddle can be used for anything from hacks to show jumping to dressage. So for me i would prefer English just because i find that they are more versatile and suit my riding preference.