What Microsoft based ultrabood should I get for around $1,000?

I'm looking to purchase a Microsoft based ultrabook for around $1,000.

Want about 8GB RAM at least i5 processor and 500 to 1,000 TB of storage.

Thank you for any advise.

Added (1). Sorry Ultrabook

There are many ultrabooks which meet your needs. Since you need ultrabooks i recommend you to have branded ones. Some of them are dell inspiron 15z, hp envy touchsmart 15, lenovo yoga 13, etc!
Each brand and each series has its own features!