As you can see from the responses- there are no simple answers to your question. I fight with passive/active myself. The bottom line is it depends on the rest of your system- and one little thing like a power cord/interconnect (Tek Line Concorde Super Sonic) , or better PLC (PS Audio/Equi=Tech/Quantum), or proper isolation products (Symposium) or room treatments (Argent RoomLenses) by themselves can take your system over the top. If you are unfamiliar with these products you can read reviews at www.audiotweakers.com
My Only Question Is.........
Would someone please tell me the name of the preamplifier(s) on this planet that when inserted into the signal path between any recent Wadia cd player and any amplifier, IMPROVES upon the sound of the forementioned Wadia when compared to running it direct using its digital volume control near its peak. Remeber contestants that the better the preamp the less it imparts to the signal. Keep in mind also that answering this question intelligently would require that you have actually tried this.