SterileBacteria, welcome to the forums.
Where abouts are you?
Yes they are the right stilts for you, no reason in the world for you to look elsewhere and I'm not just saying that.
Have you been on jumping stilts before? Do you have any sort of gymnastic/acrobatic/trampoline experience?
As David says the only key element is the strength of the spring. I would imagine if you get a pair of 60kg springs then you will grow out of them fairly quickly. You wont damage them but they will bottom out which is when the spring compresses as much as it can. On the flip side, a pair of 70kg springs could be a bit stiff at first and take a few months for you to get used to.
It's a tough call and not easy to advise without seeing you on stilts first but that's not always possible.
Oh yeah, if you want a bit of discount use our discount code when buying them, details in my sig below