Upgrade my HiFi setup!

You’re welcome. I do own Monitor Audio speakers. I’ve had Monitor Audio PL500 II speakers since 2016. I think they are very underrated and can sound great in the right room, with the right components.

Fan of both KEF and Monitor.  If the OP simply wanted to upgrade the KEF LS50, I’d normally suggest moving up the product line. But since the LS50 is going to a 2nd system, I’d choose Monitor Audio for an excellent brand change.  

To avoid side grades, downgrades and letdowns, you gotta go a lil big, especially for the kind of music you like..

Get this mofi  V10 master edition floorstander pair, $8000. It can kinda sound like a TAD Reference, but, without tad level wallet destruction.

https://www.crutchfield.com/p_700SPV10WN/MoFi-SourcePoint-V10-Walnut.html

You also need a serious amp to go with it. This Rotel should do the trick at around $4500

https://www.crutchfield.com/p_440B1590S/Rotel-RB-1590-Silver.html

Good luck.

I’m mainly listening to electronic music and hip hop but sometimes find myself listening to rock, live music

options

1- add powered sub to ls50s (my setup)

2- Move up the KEF line

3- The Mofis are a viable alternative and probably biggest bang per buck. The v10s are in your price range if big and heavy is not a problem.