Hi Razen,
I have recently gone through what you are thinking about. I upgraded my IC's from AQ Sky to both the Purist Anniversary (from CDP to Pre) and DOminus Ferox from pre to amps. These IC's are a definite improvement over the AQ Sky. The most significant improvement came when I added the Purist Anniversary IC between the CDP and Pre. The music did not lose anything that the SKY gives you, but it became far more coherent and tonally realistic sounding (best way that I can describe it). And this was with the Sky still between the pre and amps. I then subsequently replaced Sky between the pre and amps with the Dominus Ferox IC. System was even better, but the change was not as dramatic as adding the Anniversary. I was also using the AQ Kilimanjaro speaker wires. I have replaced those with Prana Wire Cosmos speaker cables. These are quite good and complement the Purist IC's in my system extremely well. (I haven't heard the Purist speaker wires but I am sure they are great as well). I also use Elrod Statement PC's on my amps - and they are staying. I have auditioned the Purist Dominus Fluid PC on my CDP and pre - and while it was good, it didn't improve my system sound - just changed it. I am now auditioning the Purist Anniversary power cord - this is a definite improvement compared to the Dominus Fluid cord that I heard - I like what I am hearing so far in my listening tests on my preamp. Hope this helps.
I have recently gone through what you are thinking about. I upgraded my IC's from AQ Sky to both the Purist Anniversary (from CDP to Pre) and DOminus Ferox from pre to amps. These IC's are a definite improvement over the AQ Sky. The most significant improvement came when I added the Purist Anniversary IC between the CDP and Pre. The music did not lose anything that the SKY gives you, but it became far more coherent and tonally realistic sounding (best way that I can describe it). And this was with the Sky still between the pre and amps. I then subsequently replaced Sky between the pre and amps with the Dominus Ferox IC. System was even better, but the change was not as dramatic as adding the Anniversary. I was also using the AQ Kilimanjaro speaker wires. I have replaced those with Prana Wire Cosmos speaker cables. These are quite good and complement the Purist IC's in my system extremely well. (I haven't heard the Purist speaker wires but I am sure they are great as well). I also use Elrod Statement PC's on my amps - and they are staying. I have auditioned the Purist Dominus Fluid PC on my CDP and pre - and while it was good, it didn't improve my system sound - just changed it. I am now auditioning the Purist Anniversary power cord - this is a definite improvement compared to the Dominus Fluid cord that I heard - I like what I am hearing so far in my listening tests on my preamp. Hope this helps.