PS4 would be the obvious way to go but it's a tough choice since you've already made progress on Xbox. PS4 is where Destiny has exclusives on and PS4 is a generally better console (though I've heard Xbox Live servers are more stable.) Xbox One is alright and you're Destiny account would transfer over if you upgraded to Xbox One from Xbox 360. I'm on Xbox One and have considered switching to PS4 but I really don't want to completely restart my Characters. I've had quite a bit of issues with my Xbox One and my internet, but other people have rarely any issues. It's personal preference. Do your research before purchasing, I didn't do enough research and I regret it.