I've had my a7 ii for a lil while and I'm contemplating upgrading and I don't know whether I should do the small leap to the a7r ii or just go straight to the a7 iv and I want some opinions from outside sources, I'm genuinely torn between getting the a7r iii because then I can get more glass but if I get the a7 iv ill have the beauty that the a7 iv is so please give me feed back.