I kinda felt in love with the d810 and the 14-24mm, i dont think i will give up on those two haha
I was feeling the same.
The D810 is amazing. Don't even think twice. Just get it.
I was very close to buy a 14-24mm to go with the D810 as well. Amazing lens. No doubt.
However, it is as heavy as it is good. Over 2kg together with the D810.
I found that a new (2013 design) lens from Nikon is as sharp as the 14-24mm, and is less than 400g in weight.
This is the Nikkor 18-35mm f/3.5-4.5 G ED. You lose the 14-18mm area, but you gain the 24-35mm flexibility.
As a super wide angle, the aperture not being 2.8 is not a huge factor for landscapes at all.
I bought that one instead, and with the D810, it is super light, ultra sharp even wide open, fast to focus, and very flexible.
Here is the DxO comparison with the D800E, as the D810 lens data is not yet available there.
Nikkor AF-S NIKKOR 18-35mm f/3.5-4.5G ED on Nikon D800E versus Nikkor AF-S NIKKOR 14-24mm f/2.8G ED on Nikon D800E - Side by side lens comparison - DxOMark
Have a look for yourself in all data analysis tabs in above link.
It is a great alternative to the amazing 14-24mm.