The D4 is a very specific tool. All of the single digit bodies are. They do what they do EXTREMELY well, but they are not well rounded. Both the D600 and D800 offer better color and better dynamic range. Both offer significantly more crop room. The D4 will also put you into the new XQD cards which are single manufacturer (Sony). For those who NEED what the D4 can do, these things are ok. For general use, I'd look elsewhere. I looked at upgrading my 2 D3s cameras to D4 cams, but decided to pass.
The 24-70 is a great lens. It's a bit short for portraits as you'll need to be pretty close to the subject unless you are only doing full length. I prefer an 85 or 105 for that kind of work.
The 70-200 is also a very nice lens. But if you're planning shooting soccer for players above the age of 12, you're going to want something longer. Something like the 70-300 would be more appropriate if you aren't going to be shooting at night.
>The D4 is a dream machine. If I were to go with the D800, I >would be looking to go with the 24-70 as my first >"significant" glass purchase. I like landscapes, >doing portraits of the grandchildren, and outside soccer and >baseball. Will this lens serve me well (as a walk-around lens) >until I could afford the 70-200?