What Cave?? A very profession photographer like you dont have 85mm f1.2???
Just kidding. The 85mm f.18 is a very good lense. I tried my friend's 85mm f1.8 and I liked it very much. But you know sometimes some people just couldn't stop thinking about the hardwares. ;-(
But after seeing your work, I feel the most important thing is the brain behind the camera, not hardware. Good hardware is nice to have but not the most. Your work makes me wanna throw my hardware to the sea.