I am missing the liquid and icy sound of high end audio with the following expensive combination . How can I improve achieve that dream sound?
Of course you are. This system is pretty much SOTA. It won't give you warm sloppy bass or icy sound. In short not boom boom tizz. The midrange will be quite forward compared to other speakers (not because it is - but because it is flat where most normally dip).
However, your amplification looks woefully underpowered for the speakers - they dip to nearly 2 Ohm - an extremely difficult load - so you may need something with high current capability like a Krell.
If the sound is claustrophobic (lacks air or spaciousness = is that what you mean by "liquid") then it may be a grill or a placement issue. The chunky way this speaker is built will inevitably mean that you get odd grill effects and some additional edge diffraction compared to other speakers - depending on your listening position/placement this may be more or less intrusive. (For example, the support structure for the midrange tweeter module may have an influence and you might try some foam padding there to see if it might be affecting the sound. Also check the manual to see if thois uis supposed to be used with grill on or grill off....I suspect the grill will make a juge difference.)