I've said I'm not buying him one (he's nearly 8) but he wants to save up for one. That's fine by me. It'll take him a very long time!
But I did say I would do the research so he knew what his target is. But I don't know which one he should get. the dsi seems good, but v expensive, the dslite looks fine, but is much cheaper, and I don't know why. The new dsxl looks, well, just bigger.
Also, do the games work on all types of ds? So if he had one sort of ds could he swap games with a friend who had another sort.
I'm so ignorant about them, but I did promise to find out.