I must say X299 Micro 2 would be only mATX X299 option for me.
Because small PCI-E slot for dedicate sound card.
She really look great for some i7-7820X with 28 PCI-E lanes.
And I could full all DIMM slots on this mobo. Hahaa...
2666 MHz is probably bottle neck for Skylake-X.
400 euro is i7-7820X available to me.
Maybe I should buy EK Supremacy EVO RGB I found for serious discount new, perfect block for her, or even cheaper X99 EVO is 50 euro.