Hi
I'm K2K user .it's voice architecture far beyond your imagination plus sample capability (k2k can read AKAI ,ENSONIC,AIFFand WAV format) .I think the most important feature for me is Control source Modulation .You can control ENV with LFO or MIDI CLOCK with AFTER touch ..it's up to you . If you want a complex synth K2K is your choice but you know.. it's take time in learning (I mean ...a lot )