Which Versions of Windows 7 is Right for my Notebook


I was looking to install Windows 7 on my notebook but was not clear which version to install on my new HP HDX 18.  So Trying to find about version comparison find this link below

http://www.shopping.hp.com/webapp/shopping/computer_can_series.do?storeName=computer_store&category=notebooks&a1=Category&v1=Performance%20and%20entertainment&series_name=HDX18t_series

http://www.winsupersite.com/win7/win7_skus_compare.asp

Just downloading the 64bit Windows 7 Ultimate from Technet