Nice. I flip flop between Qwen 3.5 9B Q6_M and Gemma4 12B Q4_K_M on a 4080 Super. They run at about the same speed and I can have them review each other's plan or diffs. For smaller projects I find them very capable, and I can step up to a better quant for slightly more challenging work.
Have you tried qwen 27b q4_K_XL? It's a little bigger than the 4080 but not too much
you can probably run Gemma4 26B on your card also at 4 bit. World of a difference compared with 12B.