One of the greatest synths ever made and I will never get rid of it. It's almost knob-per-function, except that it's got even deeper parameters than that. The mod matrix is amazing. TWO MOD WHEELS?! The multi-mode filters can run in parallel or series, and they both recreate classics and have their own unique modes.
On my rig, the main output responds to the volume knob and goes to the mixer. The aux output level is set in the menus and goes to the Line 6 Pod XT. That way I can blend distortion with the dry signal.
The only problem -- it's old. PLEASE, ALESIS, MAKE A NEW ONE! I want USB patch editing and empty presets to make my own voices. And reverb!