Where can I find a guide to the hierarchy of speaker models? I’m shopping for Klipsch speakers but I’m confused about all the models and generations of the same type of speaker

[edgarislistening]

For example, I just purchased two R-820f tower speakers. I’m trying to find a center speaker. There’s a next gen version, the current version, but how do I figure out what year version other models are? Like what is the 2020 lineup?

Is the RP-450c a good speaker? What about the 30c? 

 

I prefer the wider center speakers and I’d like to get a similar style to my tower speakers