Does anyone have any information regarding the new portable tube amp hp-v1 coming soon from fostex? Is it gonna be better then what's out there now? Is it worth waiting for or do you have any other suggestions for best sounding portable amp/dac for an iPhone? I have been looking at fostex hp-p1...

How's the Fostex TH900 with a good portable amp/DAC and an iPhone 5? Would the TH900 be considered the best sounding headphone for this set up or should I go with the Ultrasone edition 8 instead? And any ideas for the best portable amp for this set up? Thanks for your suggestions! (I mostly...