FYI the cobalt does NOT use the same DAC chip as the IDEA; the dragonfly red does. The Cobalt uses the MUCH newer Sabre DAC. Also, a R2R dongle would be really cool, but pretty difficult to make in this tiny form factor (I THINK), as those circuits are much larger. Todd - how on earth do I get in on your loaner program?? I find this product VERY interesting, but the price is VERY high (not saying it isn't worth it). Also - regarding your post above, I couldn't have said it better myself! Some dudes seriously need to chill out!