It looks like you’ve done your homework. Either of these look like extremely good matches. Because they are good total matches.
Now it’s a question of finances. I have found that the surrounds are less important then front and center. But it’s really a question of finances if it’s not much money to you then definitely get the better one. You won’t regret it or doubt the outcome. If you’re stretching to do it then you’re probably not gonna notice the difference. I find when I’m staring at a screen. I am diverted from the Audio enough that it is not as important as it is in a pure audio system.
We bought our surrounds nearly 30 years ago and we bought the highest level B&W 800 series. We have never regretted it and they sound fantastic... so it’s easy for surrounds to be a very long-term purchase.

