cool man, thanks for the informative responed , so i guess the smaller one is a good option for my small flash,
It really depends on what you're doing. If you're shooting in a situation where you just can't bounce the flash you'll want the largest modifier you can reasonably use to give the best light. In these situations I use the large flashbender. Your 430 should be just fine with it. The small is great if you want to bounce some light and still push some forward, or bounce the light while also flagging it.