I may be late to reply,but if you haven't purchased,dont buy any.Instead buy a separable convertible like Surface or something like that.I am suffering from Lenovo 'thug'.The sensor board is not working after 3 months of purchase and its insane.They sell you things with a promise to support it but guess what?They support only for 3 months!After that,no driver updates,no bios fixes,even when they do need fix.I recommend you buy from MS.I am amazed by their support.Like they are still providing updates for the old surface pro 2!!