Is Buying D7000 now (2015) a bad idea?

I've been using Nikon D3000 for a while now only with the kit lens (18-55mm). I want to buy a 50mm lens because I believe it will help the D3000 stink less when taking indoor shots.

However, when shopping around I came upon a D7000 clearance sale with price slashed to about 1/3. I know it's been discontinued and there's now D7200 but I have no money for that and I have seen images from D7000 in low light and was impressed.

Here are my options:
stick with D3000 and get, AF-S 50mm f1.8G and AF-S 55-200mm f4-5.6 ED (no VR)
OR
Buy D7000 and with (yet another) kit lens and add AF f1.8D and AF 55-300mm f4-5.6G.

I was told that the newer AF-S are sharper and have faster focusing. I'm really confused here. D3000 was fine for me but I struggle with it indoors and >ISO 800 has more noise than a rock concert.

Which of these is a better setup?

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