Take a look at Jan Johnson's (Skyjumpers) Pole Chart here:
http://www.vstraining.com/skyjumpers/component/content/article/93-articles/pole-vault/65-pole-progression-chartYour pole has a relative stiffness of 31 on that chart, so my guess is that a 13-6 150 (relative stiffness = 33)
might be your best bet.
But there's a lot of variables that must be considered:
1. How much do you think you'll weigh next season (assuming this season is over for you)?
2. How much do you anticipate raising your grip (if at all)? I assume you're capping your 13 footer.
3. How fast is your run? Do you plan to increase your # of steps next year (I think you should consider this)?
4. How much stronger will you be next year? Will you be weight-training off-season (again, I think you should consider this)?
5. How's your technique? Do you anticipate some major technical improvements once you get your new pole?
6. What's your budget? If it's tight, go for the 13-6 150. If it's bottomless, then get something with a relative stiffness of 32.
7. Have you asked your coach what he thinks? He's in a better position to know what you need than any of us on on PVP.
8. Do you need it immediately (for vaulting this summer)? If so, maybe something with a stiffness rating of 32 would be better.
9. Can you borrow or rent instead of buying? That's usually the best option, when you're learning quickly and going thru poles like mad.
There's probably a few more Qs that I haven't asked. Good luck!
And if you really want an expert opinion from PVP, then a vid always helps. Then we can see for ourselves how much you're mushing the pole, and how far into the pit you're landing. And how fast you are and how good your technique is - and if there's any quick fixes to it that will give you an immediate technical improvement.
Kirk