Integrated upgrade recomendations

Naim 5si...$1699. 

What size space, main music system?

I would use those speakers in a second system, and get new larger speakers if the space allows. Or, no 2nd use, sell them to help pay for the speakers you move up to.

I use and very much like my Wharfedale Diamond 225, similar driver sizes and efficiency, in my office (with a single sub adding just enough that they don’t sound small).

your interesting amp does not appear to have pre-out/main-in so not ideal if you want to try a stereo pair of self-powered subs.

What size space, main music system?

I would use those speakers in a second system, and get new larger speakers if the space allows. Or, no 2nd use, sell them to help pay for the speakers you move up to.

I use and very much like my Wharfedale Diamond 225, similar driver sizes and efficiency, in my office (with a single sub adding just enough that they don’t sound small).

your interesting amp does not appear to have pre-out/main-in so not ideal if you want to try a stereo pair of self-powered subs.

This is my main/only system in my den. Room is 15x15 8 foot ceilings. I am not opposed to upgrading speakers, but with the Sprout the Denton 85s fill the room nicely. Unfortunately, the digital input on the sprout stopped working and I'm out of warranty so I figured this would be a good opportunity to upgrade

The issue with many Audiophiles is they go cheap on electronics. Yes most of us know speakers/room will dictate/control your sound. When you cut corners on electronics you will never know what the speakers capability is. What % do you think the Sprout gets out of your Denton 85? Upgrade your amp then source and have basic room treatment. When this is accomplished enjoy the Denton until your ready for a speaker upgrade.

How about the Leak Stereo 130 integrated? 

https://www.leakaudio.com