I will be purchasing a Double Bass Pedal soon and most like the Tama Iron Cobra will be my selection. I was also really looking into the DW 9000 but I can't really afford $500 for it right now. I can get a Tama Iron Cobra off Ebay for probably around $200. My question though is which of these 3 subdivisions would be right for me? I went to the Tama website and read all three descriptions and it seems the Power Glide would be better for the Rock and Metal I will be playing since it adds speed and power to the end of the beater stroke. However, the Rolling Glide is supposed to return quicker which seems to me would allow for faster playing. Then the Flexi Glide I have no idea about because I've never dealt with strap pedals so please share your opinions and facts so I can make the right choice. Thanks!