No justification needed, my gear works for its living. It only has to sound good, be light, reliable and never need maintenance. I got lucky with my passive Lull with flats. In 4 years I've only tuned it.
There is a main rig (Aguilar TH500~BF SC's~Lull PJ5), a backup (Thunderfunk 750~Berg CN212~ Lakland 55-94) and maybe some stuff I'm trying out (currently Mesa D800~Fender Jazz).
No whims or fancies involved here. All potential purchases get evaluated against what they will replace. A few years ago I spent 2 hours A/B ing my Lull with a Nordy PJ5. I'd always wanted a Nordy but the Lull thrashed it, so no more Nordy interest.