I don't feel ultrabooks are worth the heavy premium and specs you sacrifice. But this laptop series is nice, fairly portable and a good bang for your buck.
This might meet your needs:http://www.newegg.com/Product/Product.aspx?Item=N82E16834215279
I've seen this go in and out of stock frequently over the last week (had been considering purchasing myself). It's considerably less than $1000, are you wanting to max out your $1000 budget or simply meet your needs?
You might also like to look at the Dell XPS series or the HP ENVY 15 series, both which you can configure for around $1000. Check out the ENVY 14 for an even smaller one though its pricier.