Define "White"?
If you mean white color from Polycarbonate, just like in MBW and pre 2008 iMac, i'd say no thanks .. That's a definite downgrade from current iMac, unless they are priced around $800 and using 17" screen, there's no reason Apple going back that way
But if the white comes from color-anodized aluminium, that would be a welcome change. In fact, Apple should make options about iMac colors. Since aluminium able to be color-anodized, with outstanding durability and color consistency, then I think it's time for us to see red, orange, blue, purple, or even green iMac .. just like old times 1998 iMac 🙂
Only in aluminium, and iX sandy bridge intel processor