hi this is wip but i wiil be glad for comments
vray 1.5 
3dsmax + LITTLE ps! the color correction - VFB
nice image! but I think the lighting on the house is too blue-ish… the whole image would be better if you gave it some warmer colors in photoshop (imo).
I like it. I can’t think of any crits really. Maybe a little flaring coming from say the upper right of the image, just to give it a little atmosphere and warmth.
looks good; i like the pool & it’s water.
I hope you don’t mind - i opened the image in Photoshop and did:
Image > adjustments > Auto Levels, then:
Image > adjustments > Auto Color
to remove the blue a bit as suggested…
i also like the plants in the foreground blurred a bit for DOF…
Micha, are you sure with the colors ? The sv image is better on my (calibrated) screen 
Upps, you mean the shadows under the balcony? I use a calibrated screen too (spyder vison suite - gamma 2.2 @ EIZO S2100). Or did you mean the colors? My version could be a little bit less red or? Maybe it’s a question of taste only.
This test image is looking fine here.
And this are realy hard to bit test images:
I have the feeling, we should open a new gamma thread now.
To be more precise, the shadow under the balconies are slightly better on your image, but maybe you loose a bit of the contrast you have in the original.
My problem is more the colors, your image seems too pink… too much red maybe ? I prefer the original colors (maybe i’ll add a bit of yellow to warm the image, but it’s a personal taste)
(sorry for the post hijack)
my guess : (boosting lowlight with curves and color correction +15 yellow +5 red)
10x all
little update