I have a Sony A9 and whilst I like it I think I would be better off with an A7R mk3. I've discussed a part exchange with my usual supplier and I would need to add about £470 to do the swap. I could afford that but if anyone can persuade me to stick with the A9 it would save me some money . I mostly shoot still life and food, sometimes I shoot architecture. I certainly don't need 20 fps and would like a better tethering socket and USB 3 which the A7R mk3 would give me.