I was a firm advocate of the OC-2 until I bought an Octamizer. The Aguilar unit is capable of the synthy sounds, as well as more natural sounds, all the way down to pure sub rumble - It's awesome. I never used the 2nd octave on my OC-2, so the Octamizer was a logical step forward, as it then gave me control over the tone of the octave note, and the tone of my clean signal. Infinitely more variable, and takes up less space on the board too. True Bypass and a Blue LED sealed the deal for me