Hi - well if you have tried them and you aren't sure, maybe go back again with a drum key and really see what they can do. Spend some time there and really annoy the staff!!! For what it's worth, I've been through quite a few pedals (Eliminator, DW 5000 and 9000, Trick, Axis, Falcon) and ended up with the Iron Cobra Power Glide. I like a heavy pedal and couldn't get on with most of the pedals I tried which all seemed too light. I had always come back to the DW5000, but one time had to play an IC at a gig and loved it - a touch lighter than the DW (maybe that's down to the beater) but still had a good satisfying weight to it (which isn't the same feeling as tightening the spring on a light pedal). I took off the cobra coil because it adds level of complexity that is really pointless - sure the coil theoretically brings the pedal back to your foot faster, but then it also requires more force to press the pedal against the coil. So, to offset this increased heaviness pushing against the coil, you will slacken off the main spring to get a good feel when you press the pedal, which then counteracts the effect off the coil returning the pedal to you.... ridiculous!
If I had two bass drums I'd have I DW 5000 for slow stuff and Mapex Falcon for fast stuff, but while the IC is over towards the DW weight, it seemed a comfortable middle ground for the speed I play. If speed is the key, definitely take the Falcon over the Eliminator... it's really smooth and fast, but with the longer footboard you can come way back on the pedal to give more weight and power if need be.
Good luck.