Yeah if you're getting refills, a brand new one is a really good idea. There's some sort of certification/inspection process for tanks, so the newer you get it, the longer it'll be before you need to get it inspected.
Oh don't give me none more of that Old Janx Spirit
No, don't you give me none more of that Old Janx Spirit
For my head will fly, my tongue will lie, my eyes will fry and I may die
Won't you pour me one more of that sinful Old Janx Spirit