I also have a DW 5000 accelerator, but in a single pedal. I think thats its very smooth and responsive. I wanted something DW, and it was on sale so I went for it. I havent played many other pedals except my Pdp double bass pedal (which says why I upgraded) my camco, and a pearl double pedal (not sure what model but it was smooth and responsive as well).
I like my DW pedal, but if it doesnt work for you, then hey stick with the Cobras.
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