I currently have a Nikon D70 that I purchased back when it was the "bees knees" and it has served me well for a long time. I get some great shots from it, but I really struggle in low-light situations. I hesitate to push it past 1000 ISO due to excessive graininess, but then need to fight with excessive flash (the cave effect), low shutter speeds, or unforgiving DoF. I think it may be time to upgrade...on a budget, of course.
I've been considering a D700, since it seems to be the cheapest way to upgrade to a solid camera with a larger sensor (and compatible lens mount). I feel like this will help me where I need it most; low-noise low-light imagery. However, even used it's a big purchase for me. Especially since my zoom lens is DX so I'll need a new one. I'm having trouble justifying the purchase unless I can really be sure of a substantial improvement.
I have seen a lot of comparisons online from automated camera database sites. What I'd really like to know is how these two cameras compare in sharpness and noise in low-light situations, though. This would be best seen through comparison photos (photos of the same subject taken with both cameras), especially with comparison crops, but surprisingly Google has failed to show me any...I guess because the D70 was more often compared to the D7000.
Can someone provide comparison photos with full resolution crops between these two cameras?