Which iPhone 6 model will be preferred?

Which iPhone 6 model do you think will be preferred to most people ( i mean which one will be most popular) ? Which colour? (space gray, Silver or gold) and which size? ( 4.7 or 5.5 )

forgive my poor english *angel* :p

4.7"
Space grey

That's the one I intend to get as well.

It's impossible to say which size will sell better, but the gold iPhone 5S sold the most and I assume that will be the case with the new ones too.