1.d4 via 1.Nf3?

When playing the Queen's Gambit, why is 3.Nc3 usually seen instead of 3.Nf3?  I don't have a book that really describes this and I don't know where to look.

I would like to play 1.Nf3 and transpose into a QG, but I don't know if that would be the correct move order. Can anyone here help me out with the Nf3 vs Nc3 move order in the QG?

I assume we're talking about 1.d4 d5 2.c4 e6, and then 3.Nc3 or 3.Nf3.

Just a few random advantages of 3.Nc3:

- Allows the exchange variation with Nge2

- Allows the Marshall Gambit (4.e4) after 3...c6

- Allows f3 and/or Nge2 lines if black plays for a quick ...Bb4 (which is perhaps why that's a main line when white has played Nf3 and Nc3, but not when he's played Nc3 only)

Of course, main top players play it with Nf3. It takes away a few options, but if you weren't going for those lines anyway, that doesn't matter.