Even the entry DSLRs are so jam packed with features you may get overloaded.
I miss my D40x, as it was so simple, straight forward, and you know what - pretty damn good.
2 years of my D90, and I still miss it!
If you buy a new camera, the next one will be out within the year, and so on...it's endless.
If you buy a new camera it will depreciate around 20% per annum, ongoing. The next model won't necessarily take better shots, but everyone will want it, dropping the price of the last.
If you buy a fantastic lens, after a year it will have dropped 10-15-20%, but that's pretty much where it stays if you look after it.
My favourite piece of kit is the 50mm 1.4. I bought it for £280 over three years ago, not long before my D90 (£800). The D90 is now £500, and the 50 1.4G is £289, second hand £230 (I'm not selling!)
IMHO, for a first DSLR, particularly if thinking of upgrading soon is simple-
A relatively cheap/2nd hand entry (D40x~£200!!?) and a fab lens Think more about the lens - how much zoom do I want; how wide do I want; how fast (wide aperture 1.4/2.8 etc)?
If you got the D7000 now though, as a first DSLR you would be mad to upgrade any sooner than 2-3 years. That's a mighty fine piece of camera!