The 12-megapixel D300S could be seen as a 'maintenance release' for Nikon's pro-specified. The main addition is a high-definition movie mode, although other enhancements have also been made. The continuous shooting speed, for example, has risen to 7 or 8 frames per second with the optional battery pack. The D300S is no bargain, though, at around £1,350 for the body alone.
Hewn from rock?
If you do lay out what is a sizeable wad of cash, you'll get a digital SLR that feels like it's been hewn from granite. When you're not taking pictures, you could use it to bang in tent pegs or beat back grizzly bears. The continuous shooting speed is only a couple of frames per second off the fastest that money can buy, and you've got recourse to Nikon's vast array of professional lenses and accessories. If you're serious about photography, the D300S can go with you all the way.
The HD movie mode was overdue, mind, considering that the much cheaper D90 has had it for ages, and it's on the new D5000 too. If you're used to a consumer-targeted digital camera or camcorder, you'll find the need to focus before shooting something of a faff (there's no autofocus during filming), but professional film makers won't mind the D300S' more laborious approach at all.
Video quality is excellent. Films might only be shot at a 1,280x720-pixel resolution, rather than a 'Full HD', 1,920x1,080-pixel resolution, but it's still a huge leap up from standard-definition movies. You can record stereo sound, too, although you'll need an external mic.