Windows 8 Tablet with Stylus and Pen support?

[///AMG]

I am looking to replace my Vaio Duo 11 with something similar and I wanted to know if there are any other alternatives I am missing.

It must have:
i5 haswell bare min, preferably an i7
8gb of ram
Min 256GB SSD
pen/digitizer support

So far on my list:
Sony Vaio Duo 13
Lenovo Thinkpad Helix
Surface Pro 2 (I dont think it has a i7 option which is why I am debating really hard)

If you guys know of any other let me know. Price range is flexible but I dont want to spend anymore than 2k.