Mike makes the best airguns in the world. I used to own one.
However, he is the only one in the world who makes an airgun system that can compete with an Unlimited RF rifle shooting first class ammo. And, even so, I don't know if Mike's system would be competitive at the ARA or PSL level.
I also believe that availability trumps price as a determining factor in choosing between an Unlimited RF rifle and an airgun. There are numerous quality gunsmiths that can assemble a competitive Unlimited rifle from readily available parts (except for Shilen Barrels) in a few months or less. Mike is the sole maker of Thomas airguns and the wait time reflects that reality.
The one true airgun advantage is ammo. RF rifles live and die on the vagaries of ammunition availability. With an airgun, once you find the perfect slug and secure a swage, you're home free.
I would really enjoy competing at ARA level with an airgun but I'm not sure I'll live that long.
JackHughs