Which Nikon DSLR to get?

I'm looking into getting my boyfriend a dslr for christmas. However, I shoot with canon and he seems to like nikon. Which is fine, nikon is great too, but my knowledge about them is limited. I think he would fair best with something that compares to the XSi to T2i. I would prefer to get something with a kit lens, just because it's more affordable, as my budget is limited to around 600$.

I believe the new D3100 Nikon came out with like a month ago is in that price range. Its still somewhat an entry level camera like the XSi yet it can shoot 1080p HD video.

The Nikon D3100 is a little better than the 550D (T2i) because it not only can shoot Full HD video, it can do so with the lens in autofocus. The canon can't

For 600$ I recommend;
- Canon EOS XS - XSi - T1i
- Nikon D3000 - D3100 - D5000

Here's a link to a post called 'Buying a DSLR, what's important, megapixels, features, brand, price, quality, video and which one to get. There are also Amazon links in there, here's the post - http://www.the-dslr-photographer.com/2009/03/which-dslr-to-buy.html

Have a look at Nikon D3100 14.2MP Digital SLR Camera
* 14.2-megapixel DX-format CMOS image sensor;
* 3-inch monitor with One-Touch Live View shooting and movie capture
* Full 1080p HD Cinematic Video with full-time autofocus and sound
* Easy-To-Use Nikon Guide Mode with intuitive controls and on-board assistance
http://www.amazon.com/...003ZYF3LO/
http://rover.ebay.com/...m270.l1313

Get Pentax K-x Digital SLR with 2.7-inch LCD and 18-55mm f/3.5-5.6 AL Lens
Capture widescreen HD 720p video at 24fps;
2.7-inch LCD with autofocus and Face Detection Live View
4.7fps capture rate with 1/6000 sec max shutter speed; 11-point wide-angle autofocus
Price: $499.79. I think for your money it's the best choice,
http://www.amazon.com/...ive=390957