White- Nice colour, makes the pc look glossy (so does blue), and its very attractive. But, the white can be easily noticed from its stains and looks like a plastic toy, imo.
Blue- Seems cool, i personally like it for the black keyboard which makes the pc look like a toy, but it may be a fingerprint magnet.
EITHER WAY: Whichever one you get, it doesnt matter, their both beautiful color which are attractive and both are nice.
ACER FOR THE WIN!