Contemplating on gopro 4 or gopro 5?

I'm contemplating now. Should i just buy the hero 4 silver go pro or wait on october when the go pro 5 launch. My budget not more than 600 sgd. The temptation to get the gopro is so great. I was in amsterdam and spain 2 weeks ago and using my xiomi yi cam and the video is awesome but i just wanna buy gopro due to its brand and the apps. Can anyone suggest me? Get the gopro 4 or wait for gopro 5?

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