How much do you have to spend?

I’m a KEF fan. Years ago I demoed the pre-Meta KEF LS50 vs KEF R700 at an high-end audio store. Both speakers sounded similar but the R700 reached notably lower bass. I have a LS50 with upgrades.

If I had both the OP’s system and 10k to spend, I’d consider upgrade to KEF floorstander like the R7 Meta AND use the rest to upgrade electronics. 

@dayglow 

The answer is akin to a Supreme Court justice’s comment on pornography. I know it when I hear it. 

Due to time, I had to do the Florida show in 3.5 hours.  So I had to move fairly quick and really only had time in each room for first impressions.  I started at the 100K rooms and worked my way down with a 350K room worked in the middle.  The drop off from $100k to $30k rooms was substantial.  Similarly, a noticeable difference between 30K and 10K.  I did not hear a large enough difference from 100K up to 350K to justify the price.  So I would say 100K.  There were alot of Active speakers on display which save on cables, etc.  Take those out and speakers were 50% of the cost.  Streamer 15 to 20 %.  Amplification/preamp 30 to 35%.

Those were all msrp prices so, yes, used would be 50 to 60K.  

$30k to $100k is a big spread.  My system falls between the two.