In reply to Owen Meany:
I've got a D5300 and love it, but there are some things I wish I'd known before I bought it.
Firstly the lens compatibility
http://www.kenrockwell.com/nikon/compatibility-lens.htm
http://imaging.nikon.com/lineup/dslr/d5300/compatibility02.htm
Basically it will only autofocus on the newer lenses. I'm currently looking at getting a few primes (35mm, 50mm, maybe a 90mm), and looking at second hand lenses I know that AF-D lenses won't autofocus so have to decide whether it's worth it or not.
Also if you put the camera into self-timer mode (night-time star trails etc) it will switch back to normal mode as soon as you take that photo. There seems to be no way to "lock" it in self-timer mode. It's only 5 seconds to put it back on, but I often forget to.
As for the GPS... never used it. You might, but I haven't. Ever.
I do love the camera. I love the photos it takes, and how it handles etc, but these are my gripes with it.