Don't go for the D3x. Nikon practically killed that body by selling a D800(e) much more capable if high res is what you are really after (question your pursuit of high res first - do you really print regularly larger than 13x19 ?).
The D3s is a better D3 and with the price difference on the used market I think is worth to pay the difference. Mainly you gain ~ another stop and you have less sensor dirt.
Another way of getting high res and saving that big money D3x still go for is to get a D3 (non S) AND a D7000.
But honestly, since I got that 58/1.4 AF-S I am not so sure about the Noct-Nikkor anymore. The 58 AF-S has A LOT in common in image character wight he Noct and that at half the price brand new.
The 58AF-S is substantially better than the 50/1.4 AF-S and sharper and much smoother than the other fast 50 Nikkors.
It's biggest trait in common with the Noct is that it really melts background like no other 50 Nikkor and that it renders light sources properly in low light edge to edge similar to the Noct.
street portraits with the 58 1.4 AF-S G + D800e on the first day out:
…and stopped down (f2.8 I guess):
I think if I had to shrink Nikon SLR gear to the extreme, I would sell everything except the old D3 + 58AF-S + 24AF-S and if I could I would keep that 300/2.8AF-S as well, covering everything in need.
The D3x really is a low ISO tripod camera by design, while with recent DX and FX Nikons it really is not THAT high res anymore.
By contrast the good old D3 is still VERY valid in 2014. That sensor was simply a masterpiece back in 2007 and still competes very well with many of todays high end cameras.
The biggest trouble for the next years with the D3 series bodies will be to get batteries for them as Nikon does not manufacture them anymore (new Japanese legal regulations forced them to omit the high capacity D3 series batteries in favour of smaller batteries in the D4 series).
The few original D3 batteries I still regularly though hold up well still, easily getting over 800 shots a charge(down from over 1000 new).
For the low price you get a D3 nowadays, those are real bargains - reason, why I kept mine as it's use far eclipses it's re-sale value at current prices, even in really nice cosmetic conditions from first owners they are cheap by what they used to sell for. I am happy I didn't sell mine as I planned when getting the D800e from a user perspective as well.
Somehow the Nikon DSLR full size bodies have something really nice about them -rock solid and ergonomically simply perfect.
The D800 and also the Df feel like plastic toys compared to the old D3
😀
Be warned though, the D3 files are nowhere near as nice as the M Mono files. You will be disappointed in regards of detail and tonality - not much of a problem printing 13x19 though.
Before you go on a shopping spree, have a really, really hard, good think and approach it from the points of:
- resolution needs (print size)
- low light needs (also thin about using slower lenses in low light)
- handling preferences - if your favourite daily hauler is a pair of F3 + MD-4 you probably prefer the D3 over any small body Nikon DSLR.
If you like the F3 finder with magnifier and accessories, the D3 and D700/800 are the only game, the D3 series having a slight edge with more coverage and a better eye point
Don't rush this, D3's are getting cheaper by the day ;-)