Upload & Sell: Off
From my personal experience with all 3 bodies (D4, D800, D800E, about 5k images each) and the way I understand where you are coming from.
Take the D800.
Its 3k cheaper than the D4. If you are willing to spend the 6k for the D4, you will get 2 excellent fast lenses (i.e. AFS 35mm/1.4G and AFS 85mm/1.8G) to the D800/D800E, which in combination will produce better images in low light than the D4 with slower lenses.
If money is not an issue, take the D4 with the 3 fast 1.4 lenses and I "promise" you an unrivalled low light experience.
Price/performance wise the D800 is the better deal.