I prefer the DW 5000 series pedals over the DW 9000 series. I can't justify spending the extra money to upgrade when playing the bass drum is mostly about technique anyway. I haven't ever tried the Iron Cobras (the name sounds too silly too me - like they will make you into a martial arts guru like Pat Morita). At one Yamaha was making some of the smoothest double pedals available but I don't know if they are still available or not, I believe they were the 900 series and defintely before the Flying Dragons (what's with all the reptile names?).