I'm partial to Mole-Richardson fixtures because of their robust construction - I've got fixtures in my inventory 25-35 years old that work well.
I use a mix of Arri, Mole and some older Colortran and Century-Strand units. The largest are a few Mole 5k Seniors and Colortran 2k Pan/Cyc fixtures...the bulk are 1k Babys, 1k-650 Arri fresnels, 1k-500w. open face Mini-Moles and Arri along with a assortment of 300,150 Arris and 1k and 750 w. Source Four par fixtures.
I don't own any Kinos yet, and I rarely use flos - or HMI so I rent.
Don't forget about controlling the light - flags, cutters, c-stands, gobo arms and heads. I swear it seems that I have three stands for every fixture and another milkcrate full of scrims, gobos, gels, clamps, clips and barndoors for each one as well.