Headphones Newbie; Senheisser HD 800s or Focal MG Clear

Hi

I'm currently down to one pair of speakers, Quad 2905's. And because these speakers are with the repair technician on a continual basis, I need a backup. While another pair of Quads or another brand of speakers would be ideal, I don't  have that kind of money at the moment. So I've been thinking about buying a pair of headphones that punch above their weight class. My local Senheisser dealer says the HD800s and my Focal dealer says the MG Clear. I really like the looks of the Focal's and am leaning in that direction. I'll just use the headphone input on my ASR Emitter Exclusive II. All suggestions are appreciated, thank you!