I find that in regular gym use, 'phones do not last more than a year or two.
I use inexpensive Soundmagic models, currently PL21. Not £90 good but as good as anything under £50-60. The PL30 feel a bit more heavily built but sounded just a touch too bassy for me, though I do like a light, fast bass. Might suit you.
If they get lost or broken then it is no big deal at those prices.