Personally, I'd punt the rx-v530 before I bought other speakers.
My amp journey with my cornwalls was, I started with a mid level Yammy receiver, upgraded to another Yammy receiver, followed by a Adcom 2535 with a Emotiva ump - 1 next came a SE tube amp. Each step there was noticeable differences.
Good luck chasing the dragon, enjoy.
In my opinion Hersey's would be the wrong move based on what you are describing.