They seems have stock at store house, as I got the only one on display, and my friend got another pair later yesterday, how many radar stocked? I dunno.....
head-fi guys highly apraise DR150 as giant killer and king at their selling price, the best fun of the GR headphone is 3.5mm input at headset, you can wire it with other DIY cable, even driving by pre-amp, power amp, and it's easy to drive, ipod classic will give u good quality without headphone amp.