In my personal experience, I tried a Denon once and returned it back within a week as I didnt feel the real punch that is expected. I would suggest to Audition and decide.
There are many online sites who sell various brands and models, you need to be sure of warranty if purchasing a new one. Some online purchases are not entertained by the Service center...before making any online purchase, please check with the service center if the online dealer is registered with them.
Given limited budget, the pre owned route would make sense as you also want a certain AVR...if a Marantz then with HDAM circuitry etc.
The problems with auditioning is COVID and the fact that the receiver and speakers will sound different in my room. That’s why I would rather listen to peoples opinions and decide.
One thing made clear from the Denon owners thread is the big step up in quality for movies with the Denon.
May I ask which AVR you have and how is your movie experience?
I like Marantz but don’t mind either. As a few have recommended on here that Marantz for music and Denon for movies.