I wanted to buy a Z1R but having the Z7 and listening my music alot while in bed I heard that the Z1R is utterly unconfortable in bed being too big and touching the pillow. The Z7 are simply perfect in size. What is your experience? Is the Z1R a good improvement to the already amazing Z7 which...

Yes these two you mentioned seems to share the same drivers. Not for the 58X though which it has a complete new driver but with a little damping mod can sound very similar to the 660s.

I heard the HD700 and they were very bright and loved them with classical and jazz.. Did not purchased them as they were expensive. Buying these 58X instead. I would not purchase if I had the 700.

Can I use the RCA DAC output as RCA in for a CD player for example or a phone? I find it strange the R2R not having a RCA input.