Headphone or Rig?

I own Magnepan speakers and planar magnetic headphones. The headphones cost 50% of what I paid for the speakers (both new). I find that the sound of the headphone is pretty much identical to the sound of the speakers except for the sound stage being in the head.

I've listened to some of the Binural recordings on both and the sound stage on the headphones does come closer to those of the speakers on some of them. I find the Chesky recordings the best for this.

I guess I should mention the headphones are the Hifiman HE200s and the speakers are the MMGi.

My main system is definitely quite a different sound signature from my headphone setup but that's what's great about it.   My stereo has a big , bold , live sound whereas my headphones are very revealing , sometimes  spooky how things I've never heard on recordings are floating around my head.    

My speakers are Klipsch Heresy III driven by a c-j preamp and Quicksilver mono amps.  It's fun to listen to and can rock out, with a huge soundstage and great dynamics. 

My phones are Grado RS2e driven by a O2 Headphone amp.    I wanted to get a decent pair of phones without breaking the bank mainly because I didn't really know how much I'd use them.  Turns out I' m using them often, rediscovering albums and CDs.   Definitely best $600 spent in a long time.