I would suggest getting the lightest tint available - especially for eastern skiing where the number of sunny days are limited. From checking the stores, most goggles with only one lens now have an orange tint, so your choice is mostly how dark the orange tint is. It is in flat light conditions that the lightness of the tint is most critical to see variations in the terrain, and I find a lighter tint works best for my eyes in flat light conditions.
The best tint for night skiing is yellow, but lately, I have only seen expensive goggles that come with two sets of lens with a yellow one.
One suggestion - in flat light, ski close to the trees. Trees tend to reduce the amount of light hitting the snow at low oblique angles, which causes the loss of definition in the terrain.