To clarify....
EVGA, sales very poor, overpriced, no profit margin plus supply was a headache, so we dropped them. They may return soon.
Gigabyte recently changed range. Entire launch range, with exception of X99M-Gaming 5 is discontinued. Only UD3P (not going to sell), UD4P, Gaming 5P (all brand new) and Champion remaining. At least one more new board expected soon.
MSI are transitioning from their original launch range to USB 3.1 versions but stock hasn't arrived yet.
Asrock, poor sales & terrible support. Just got out of a meeting with their UK representative so this may improve soon.