I also bought a pair of Dali 104 in 1994 for $4000 and sold it in 1997 for $1500, such a long time when I look back. I remember I kept the boxes for a few years and your attached photos remind me this old story.
After I sold Dali 104, I owned Energy Pro 4.5, Audio Pro Black Diamond. Actually they are at the similar price range (~$5000) 2nd tier of brand. The performance is very similar.
But recently I changed it to Dail Ikon 6 the performance on movie and music is unbeliverable. I'd say the improvement is > 60%.
The most cost effective way to improve your system in investing in your speakers. It is worth to invest more in it than player, power supply and cable.