It's up to you of course but I'm going to point out the difference in price between the D3100 shown above and a D3300 on Amazon (dot) co.uk is only about £120.
For that price increase you're getting a camera body without an OLPF, which will give you significantly better image quality. The '3300 is has much better resolution, better color depth, more dynamic range, better battery life, a much higher resolution rear LCD, higher maximum ISO, shoots faster and it's lighter. And that's just off the top of my head... I say all this without taking anything away from the D3100; it's just that the D3300 offers you a hell of a lot more for that paltry £120 or so.
...
I have been looking at the D3300 and it dose sound very nice. But now its just a bit out of my price range. I would like to get a lens, mem card, case, extra batt and so forth.