But the XT1 doesn't meet your criteria ... it's not full frame.
But, but.....N-E-G-L-I-G-B-L-E! APS-C = FF
The mirrorless question doesn't have to be us vs them. As consumers, we all benefit from having a diverse range of cameras available from a wide range of innovative manufacturers. In 50 years, I'm certain people will look back at this time as a golden era of camera design.
I've got a couple of Fuji mirrorless cameras - X100 and X-E1(and previously owned an Olympus m43 camera). IMHO, they are fantastic. I still take ye olde Canons out of the cupboard when I have specialised needs, but otherwise, mirrorless cameras are more than adequate and in many cases are a much better option.
Re Canon and mirrorless - I don't think they are doing themselves any favours. If they are going to persist, they should be fully committed to the EOS-M system with more lenses being released and a family of camera bodies of differing levels of specs / price levels. Instead, currently the Eos-M is a fun accessory for a DSLR shooter rather than the stand alone system that it could be.