Asus vivotab smart. I'm actually typing this on one of those. Its not a quadcore though, only dual 1.8 with hyperthreading. Has micro hdmi out, 64gb storage, microsd slot, Bluetooth, 10.1" screen, gorilla glass, and there's a deal on amazon on them right now for about 480. I love mine and have actually retired my laptop almost fully, I only use it for games now.
And the best part, it runs full Windows 8, meaning you're not limited by what's in the Microsoft store, you can run any .exe you want. Given some intensive things might be slow, but for example I have PhotoShop cs6 on mine and it runs perfect and fast