Yamaha DTXpress/DTXplorer/DTXtreme

Anyone want to put in their two cents on the 
advantages/comparisons/differences in pedal construction, namely the 
use of single or double chain, or straps.  Looking at the Iron 
Cobras, but haven't played in a great while.  I think the ones that 
I did play back then were attached by cow (or dinosaur) hide...

Thanks... Steve