So I don't know if this is the right forum for this, but here it is anyway. I currently have a D90 with an 18-200 DX lens and a 50mm f1.8. I would love to have some much improved low light capability via less noise at higher ISOs. I don't really like to take my D90 beyond 800. From what I gather, the D7000 is a good upgrade to the D90 in the areas I am looking for, and sticking with DX helps with my current lenses. This is a cheap/easy upgrade assuming I can unload my D90.
I also have a smokin' deal lined up on a lightly used D700, but I don't know if I can afford adding a bunch of FX lenses to my arsenal. Then there is the whole, do I bite the bullet and go for the D600 if I do decide to go FX.
1.) Is a D90 to D7000 jump worth it in terms of low light performance and dynamic range?
2.) Would it be better to skip the small jump to the D7000 and try to get into FX if I can, even if I need to shoot mostly in DX mode for a long time.