Upgrade my HiFi setup!

I recently went from LS 50 Meta to a gold 100 6G. Along with a pair of REL 7/x’s into a Anthem STR preamplifier and power amp. Quite happy with the results. Unless it is a space saving issue, I would personally look at a separate streamer such as this InnuOs https://innuos.com/stream1/. Otherwise sounds like a fantastic plan. 

Thanks @soix 

I’m using this setup for 7 years and want to upgrade it. 
the improvement I’m looking for is with the sound quality the speaker produced, soundstage, details, dynamics and transparency. 
I like the LS50, just want to upgrade. 
 

Thanks @gkelly 

I have enough space, the whole room is just for music listening. 
Do you hear a significant improvement?

Definitely hear a difference. Am an admitted fanboy of InnuOs. 
Also these can have a huge impact, using the pairing tool helps. 

https://rel.net/pages/speaker-pairings

2 suggestions.

1) Wavetouch modded Assemblage ST-40 tube amp + WT WT-95 SACD, CD, flac player + streamer Click here to hear it. 

2) Bluesound powernode modded.   Click here to hear it. 

The room in videos is 32ft W x 44ft L x 12ft H. You won't never envy of $million system with these humble systems. They are very affordable. 

Alex/Wavetouch audio

I used to have the LS50’s in a room the same size as yours, they are a great speaker. It is challenging to find replacement that is that good and also won’t overpower the room. I was successful in adding a subwoofer to that system and had fairly well balanced sound.

The Rega is woefully underpowered for those speakers, especially given your preferred genres. I would keep the speakers for now, add a subwoofer, I had a REL 7i, and consider an amplifier upgrade. On top of that get a separate streamer and DAC. All of this you could do for under $10k, especially on the used market, and significantly upgrade your system.