Upgrade from Sierra EXv2 to ELX Towers?

[Enryu]

I had purchased the Sierra EXv2 about a year ago when the ELX towers were not out. At that point I had decided on the EXv2 as the current towers were an older iteration. Recently, I’ve been considering an upgrade to the ELX towers. However, I’m a bit hesitant since I’m not sure if the ELX towers would be a significant upgrade given that I already have the EXv2. Could someone with experience with both of these speakers let me know if there is a significant difference between the two? I do know that ELX has much stronger bass so I would be likely running EXv2 with a sub to compensate (seems you can run the ELX without a sub). If I went with the ELX, i would probably sell my EXv2 or put them in another room.

I typically listen around 70-80dB and I use the system for about 50/50 with HT and music. I plan to get a Horizon to pair with my speakers. My room dimensions are around 17'x25'.