Intel NUC Kit NUC5i7RYH Barebone System: $477
Samsung 850 EVO 250 GB M.2 SSD (MZ-N5E250BW): $110
Kingston Impact SODIMM - 16GB Kit* (2x8GB) - DDR3L 1866MHz CL11: $112
Total cost: $699 (I have a Win8 key)
She's not a gamer so the only intensive thing this box will ever need to do is occasionally play full screen 1080p video and maybe some light spreadsheet work. Some might say the specs are overkill, I say it's future proof.

What do y'all think?