I have a super duo 3 and I love it, good solid charger, not too big for all the power it has, but that I Charger does look pretty cool, no comment either way on the I Charger as I have never used one, nor do I know anyone who has one...

I don't know what kind of racing your going to be doing, but if I was going to do on road only, I would lean towards the LRP Pulsar touch, but I run both on and off and I have both!!!

I just changed my on road charger from a GFX Turbo 35 to the Pulsar Touch.
Off Road it is a Super Duo 3, 2 - 4s packs charging and balancing at 10 amps at the same time (capable of 20 amps each) is pretty sweet!