Looking for a ultrabook.

Hello everyone, I'm trying to buy a ultrabook for college. Here's the specification I looking to have in the ultrabook:

What is your budget?
$ under 900

What country will you be buying this in?
USA

What size notebook do you prefer?
Thin and Light (13 - 14-inch screen)

What brands do you like or dislike?
none

Would you consider a refurbished laptop?
No

What are the primary tasks you need this notebook for?
Web Surfing, Listening to Music, Movie Streaming and Viewing, Casual Gaming

Where will you be using this laptop?
Will be used different places

How many hours of battery life do you need?
around 5 hrs

Will you be buying online or in store?
online or in store

Which OS do you prefer?
windows 7, though I'm just gonna purchase the windows 8 upgrade anyway.

List the screen resolutions that interest you:
Standard Resolution (1366 x 768)
High Resolution (1600 x 900)

Is the laptops design important to you?
Yes

Approximately what date will you be buying this laptop?
whenever I found one that's best suit for me.

How long do you want this laptop to last?
4 years

How much storage capacity do you need?
looking for one with a 128G SSD

Are you interested in SSD for storage?
yes

Do you want a built-in optical drive, what type?
No

Note*:Looking for something reliable. Doesnt run hot. Performance index at least rated 5. Long lasting battery at least 5 hours. Good cpu and gpu. Preferably with back lit keyboard. Thanks for any insight.

currently I think this ultrabook looks pretty good so far: Dell XPS XPS13-40002sLV 13-Inch Ultrabook Laptop (Silver) http://www.amazon.com/Dell-XPS13-40002sLV-13-Inch-Ultra...