What's a better buy? D300s is the last of the consumer 'tanks' all magnesium bodies. Solidly built and it's sensor capable. Don't forget video.
The D7100 !!!!
I know our own coastalconn, the fine bird photographer from Connecticut, used the D300s for a long time, and resisted moving to Canon and resisted buying a D7100...but he finally gave in, and bought himself a D7100...I noticed immediately that his images had higher technical quality...there's twice as many pixels in a D7100 image, and the sensor gives wider dynamic range, deeper color depth, and less noise than the D300s sensor...
For "some" people, the build quality and the controls and such that the D300 series offer is a big deal, as is the fairly deep buffer the D300s offers. There are times when a guy has to wait and wait and wait for a subject to get within range, and then he wants to shoot,shoot,shoot,shoot; that's the kind of thing the D3 and D4 pro bodies offer, like say a 29-frame .NEF buffer at full Continuous HIGH speed advance...the D7100's buffer is like 6 or 7 frames on Continuous High...it will shoot longer on Continuous LOW-speed, but the firing rate is much slower. Switching to JPEG mode helps, but then you end up with...JPEG captures....which might not be acceptable for a few reasons.
The D7100 has the image quality and the great sensor people want, but the body's controls, and the buffer depth, and the firing rate, are all decidedly "consumer", whereas the D300s was more "pro-level". I think in this ever-tightening camera market, the number of people who absolutely MUST have the "pro-level" camera-body features is just not large enough for Nikon to worry about. The amateur and hobby shooters and the small-time pros of today, the people who bought the D300 and D300s because they were
good imagers, can now buy BETTER image quality, in a camera that costs as little as $599.
The up-tick in absolute, technical image quality of the new, 24-megapixel consumer cams, like D3300, D5300, and D7100, is pretty impressive. The technical image quality (DR, color depth, lack of noise) of a cheap D3300 is BETTER than a professional Nikon or Canon 1-digit camera body of a few years ago. The choice today is "the tool" versus "the image quality". MOST people are now opting for the image quality, at lower price, and are willing to give up the build quality of the older semi-pro camera in favor of better image quality, with more cropping capability, higher resolution, better color, and better High-ISO capability.