Need advice on upgrading rear shocks

Currently running Bilstein 5100 in the rear of my 2016. A vast improvement over stock, but I’m hoping a further upgrade will soften things up even more. I’m 100% mall crawler so don’t want to over buy.
Considering Icon 2.0 or V.S. 2.5. How much of an improvement will the 2.0 be (if any) over the Bilstein? Is it worth it to spend a little more for 2.5s? The last thing I want to do is upgrade incrementally year after year. I want to make a final investment now. Why Icon? Good reviews, positive comments here, and price point is just right. But I’m open to suggestions. Thanks!

 

@Icon_Adrian I'm sure you'll get some good answers from the source.

 

Do you have Icon or Bilstein in the front? Icon and Bilstein have digressive valving. Most others are progressive. Personally, I wouldn't mix progressive and digressive but that's just me.

 

6112 up front