There is no definite answer to your question. It completely depends on the level of the shooter and what you're looking to get out of the break shot.
For instance, from where you're at, I feel totally comfortable shooting 5-9-13 because I know I can get on the 13 with a very steep angle. From there, you cut it in and load-up on low and fire away. The result is something similar to an 8-ball full-speed break with few balls touching. It's "absolute annihilation" from that 13-ball.
Now, before someone chimes-in and says, "Yeah, but you can scratch off the side of the rack - so it's too dangerous." I'll say that every single time I've had a ball where that 13 sits and I think I can get to it -- that's what I'm shooting for. In addition, out of ALL the times I've shot it, I can't remember the last time it scratched. If you remember to zip the low, the ball hits the side of the rack and warps to the side rail - the scratch literally never comes into play unless something unforeseen happens. I recommend setting this up and shooting it 10x or so. You want to sit on that break ball in a way that isn't a paper-thin cut nor is it a thick cut. 1/2 ball to a hair thinner is ideal.
5-13-9: Most people chose that because it's literally stop-stop-stop. Therefore, to many, it seems like "THE ANSWER" to the question. HOWEVER, you really have to pay attention to a few things, in my humble opinion:
1) The CB must sit where the 13 sits. Too much offset to the center of the table and you'll never have enough energy to break the rack open effectively. You must have a thinner cut on the 9 to do any damage from there.
2) The end result, even with a well-executed break shot, will result in a much larger muck that what the 5-9-13 delivers. Therefore, it requires the shooter to be able to setup for secondary and tertiary break shots throughout the rack. So for everyone that defaulted to 5-13-9, you have to ask yourself in an honest manner if you're the level of player who has the CB control to do that kind of stuff at will.... i.e. the "chip-away" style of play. If so, perfect... if not, what seems like "book style of play" probably isn't the best answer for you.
For me, if I see an opportunity to annihilate in a way that isn't super risky, I take it. Although I can chip-away, I prefer to incinerate the muck when I can and tap-tap-tap-tap the balls in at my leisure as if I'm just clicking them in for fun. That's a LOT less stressful that sweating getting on a secondary or tertiary break shot 3 or 4 balls after my initial break.
Just my humble opinion, of course.