Upload & Sell: On
Blazio, welcome to FM & congratulations on your D600, it's a very fine camera. Both lenses you suggested serve different purposes and it's hard to recommend any of them over the other for that reason. for example, you cannot use the 16-35 for portrait (you can for a creative effect but that's limited use) and you cannot go wider than 24 with the 24-85 so they are impossible to compare.
The 16-35 can definitely be used for weddings but that would comprise around 10% of the shots. On the other hand, the 24-85 is IMO wide enough and perfectly fine for tight spaces though it can be slow for indoor and here VR comes into help. The 16-35 main advantage is the UWA perspective and not how much can be included in the photo.
May I ask if you are going to shoot for money or for friends & personal use? If you are shooting for money then my advice is to save up for the 24-70 2.8 since it's the most used lens in weddings and every wedding photographer swears by it, I am actually saving to get it. Otherwise if you shoot for fun then my advice is to pick up a 16-35 f/4 (or a Tamron 17-35 if money is an issue) since it opens up new photography doors for you in the UWA arena. My passion for photography was boosted when I picked up the Tokina 11-16! You have the 50 1.4 for "normal" photography and night shots. Maybe later you'll add a 24-85 or even better a 24-120 f/4 and maybe a tele.
I had the 24-85 VR and the 16-35 and they are both sharp and well built lenses, so I wouldn't sweat over figures and charts. One last thing, always buy used! (well not always since now there's a rebate )