I'm migrating to Nikon and I had my eye on the D750 because it's lighter, it's rated as -EV3 for low light focusing, awesome high iso, it has a tiltable LCD (awesome because I shoot video). But then I started looking into the D800...bulkier for sure, but with also awesome ISO, -ev2 low light focusing, us$600 cheaper than the D750 here in Brazil AND it has 36mpx, which means A LOT of potential for cropping (awesome for wedding shots!).
To be honest after all the awesome reviews I REALLY had my eye on the D750 (the LCD counts big points for me as I shoot a lot of video), but the crop potential of the D800 for weddings is just awesome (plus I could buy a 28mm f1.8 or a 50mm f1.4 with the spare money).
At the same time I hear A LOT of people complaining about the D800's huge files.
What do you guys think? Did anyone here use both?