Sony Ericsson Xperia Arc S - Black or White?

[M4RK1988]

Please help me decide!
My girlfriend says White definitely.
The guy in the phone shop says black definitely.
I'm undecided, some days I like black and some days I like white, but I want to order the phone tonight! What would you choose and why?
Thanks for your help

 

[YangChenRun]

I bought the white (silver) one few weeks ago.. white is more elegant and exquisite...while the black one looks cheap.