D7000 or D700 full frame?

Aarghh!

I want to upgrade my camera this year, but I really can’t decide.

Stick with the DX crop sensor and lenses and get the Nikon D7000?

Or make the shift to full frame, get a Nikon D700, and have to sell my Tokina 12-24 F4 DX and Nikon 17-55 F2.8 DX lenses and upgrade to perhaps the Nikon 24-70 F2.8 FX lens?   (Luckily my other lenses are full frame ready).

I know the D700 route will be much more expensive in the end, but will it be more worth it in the long run?

Nikon D7000 - http://www.dpreview.com/reviews/nikond7000/ and http://www.kenrockwell.com/nikon/d7000.htm

Nikon D700 - http://www.dpreview.com/reviews/nikond700/ and http://www.kenrockwell.com/nikon/d700.htm

Looks like I’m not the only one pondering this question!

http://photo.net/nikon-camera-forum/00XJa7

http://artoftheimage.blogspot.com/2010/11/nikon-d7000-vs-nikon-d700-high-iso.html

http://nikonrumors.com/forum/topic.php?id=2527

[Update 9 March 2011]

I’ve finally decided to go full frame.  At the back of my head, if I went DX, I would always think that the low light, high ISO performance wouldn’t be the best I could get within my budget.   One useful site I’ve found is snapsort, which lets you compare features of cameras.

Here is the comparison between the D700 and D7000 – http://snapsort.com/compare/Nikon_D700-vs-Nikon_D7000

The thing that swayed me is the noise performance.  According to DXOMark, a picture at ISO 1167 on a D7000 will have the same amount of noise as a picture taken at ISO 2303 on a D700.  Wow – a full stop! 

And comparing to my current D80 – http://snapsort.com/compare/Nikon_D700-vs-Nikon_D80

D80 ISO 524 is equivalent to D700′s ISO 2303.    That’s just mind boggling.

I’m thinking – you can always invest in new lenses, but the noise in the sensor is fixed by your body.  A D700 with a 50mm 1.4 lens, or a mid range 2.8 zoom would be amazing.