Is the Nikon D90 DSLR still a Worthy camera to buy as it is now 4 Years old?

People seem to forget that when you buy a DSLR camera you are buying technology and technology as we all know goes out of date. (Example anyone remember VHS Video camcorders thought not)
I'm looking for a replacement for my elderly Nikon D40 DSLR which I have owned from new. I looked at the D3100 but I'm not happy with the camera body build quality, The camera body seems to be "Watered down" in quality over the quality of the D40 Body (For a entry model the D40 had a good build quality with nice tight shut lines and no creaks with a nice Grip feel which is more than can be said for the Canon entry models DSLR cameras like the 1000d and the 1100d)
I don't need a rear screen that spins around so that rules out the Nikon D5100
So the only models left are the D90 and the D7000
I'm not sure I want to spend almost £800 on a D7000 body
So the only choice left is the Nikon D90.
My only problem is the D90 is now 4 YEARS OLD. The current generation DSLR cameras have better low light ISO performance and better 1080HD movie mode (I would not be using the movie mode much but it is a nice option to have)
OR Should I wait and the D7000 will fall in price (And it will)
Sorry I'm waffling now. Is the Nikon D90 DSLR still worth buying (Despite being 4 Years old)

I'm still using a D90. Just because newer cameras are out there with perhaps a bit more capability, it does not mean this camera is a slouch.

The only reason not to buy one is if you can get a newer camera at about the same or slightly higher price - provided the features are the same (in-camera focus motor, CLS remote commander, etc). The only camera that has those features is the D7000. The D3xxx and D5xxx cameras are entry-level and lack those features.

So you have to decide whether or not the higher megapixel count of the D3200 etc is more than enough to offset not having an in-body focus motor or CLS remote commander capability.

But if you can find a D90 for enough of a deal, then I would not hesitate - especially since you are coming from a D40.

Video is not the best on the D90, but then again, DSLRs are optimized for photos, not video. If you are really serious about video - don't buy a DSLR - buy a video camcorder.

Unlike TVs, VCRs, DVDs, music players, digital/satellite TV receivers, which are considered consumer electronics, high end cameras are considered specialist electronics which evolved in a progressive manner. Improvements are incremental, and cameras which are six or eight years old are still valid today. In fact my main camera is a Canon 1Ds markII which arrived on the scene in 2004, by being the flagship model of its day, it had the best of everything, and will still beat any new £800 DSLR.

The D90 may be four years old, but the sensor was ahead of its time, being the same one that is fitted to the D300/D300S. It has a capable 11-point AF system, and wireless CLS, which is more than what you get on a D5100. The D90 is also considered a mid-range product and can be fitted with a proper vertical grip made by Nikon.

The D7000 has two advantages, newer high end Nikon cameras saw the reintroduction of the AI coupling ridge, which allows much easier use of these lenses with the older generation of mechanical AI/AI-S lenses. This change is very useful for video, as a lot of camera operators prefer to manuall pull focus, and so AI/AI-S lenses have fallen into fashion. The D7000 like other high end Nikons, has weather sealing which could be useful if you're working outdoors a lot, but does require you to buy weathersealed lenses.

However as someone who is mainly focused on photography, I can't see any great improvements which justify you going to D7000.