If you are thinking about buying a D700 and slapping on a $300 lens... the D700 is not for you.
Easy there sunshine....... I love my little $300 35mm lens.
Cost is always an issue. Even if you have the money, better to splurge on lenses than on bodies.
Your choice of lenses above tell a different story.
I appreciate you suggesting lenses for cameras this way I can research them and have more ideas about lenses.
Although I have a good range of zooms, I really am appreciating my primes more. The 35/50/85/105 primes are a good assortment. Primes are
usually cheaper $$, better IQ, faster, better built, less obtrusive, lighter weight and less to go wrong.
Just for giggles, I took the 2 shots below with a D300 & D700 for your entertainment. I "slapped on my $300 lens" too, just for Jerry

. The shots are straight out of the camera and only resized the jpegs to 800 pixels wide.
35mm focal length, aperture = f/4, shutter speed = 1/1.6s, ISO200. Subject to camera = 11 inches.
Although it looks like I focused on the nose with the D300 and the eyes on the D700, that should still give you an idea of the crop factor of DX versus FX.
BTW, I bought into the Nikon system primarily for Nikkor glass. But, that's just my opinion.