I have a D7000, and DX glass fropm 10mm up to 300mm. I'm very happy.
YET, for some reason, I have the urge to buy a friend's Nikon F100 film body. I can use my 50mm 1.4, and 70-300, and ( I think) Sb-600 flash.
Have any of you gone back to an occassional roll of film lately?
I bought a Nikon N80 for the fun of it. At the time, I had a Nikon 50mm F/1.4G and a Nikon D90 with a Nikon 35mm F/1.8G. This allowed for direct comparison, with similar quality lenses (one DX, one FX)
It was no contest. The D90 crushed the N80, both with Velvia 100 and Provia 100F film, which are supposedly the best available. Here are some comparisons. Click "Original" to see the 1:1, for the Velvia 100 shots, the slide was scanned with an Epson V700 scanner, and sharpened up a bit in photoshop to try to match the sharpness of the D90. I've verified that the V700 is more than up to the task with regards to resolution (dust shows up crystal sharp at scan resolutions beyond what the emulsion could resolve)
For resolution comparison, look at the brickwork on the buildings, notice how much clearer and more detailed it is on the D90.
Provia 100f showed better colors, but otherwise the comparison was similar. Here's a Provia 100f shot (Sigma 150-500 at 500, F/8 or so, if I recall correctly):
It's possible I could have gotten slightly better results with a professional level slide scanner. But, IMO, the D90 has more resolution, better colors, and is a heck of a lot more convenient. Fortunately, I only spent $75 on the N80, and I've only shot 3-4 rolls of film through it so far. Maybe one day I'll shoot another roll for fun, who knows, but if IQ is important, you'll need medium format film or bigger to compete with modern day DSLRs, at least based on my experiment.