I'm looking at the SP2 256gb version due to the extra 8gb of ram. but the accessories are what I'm concerned. USB ethernet adapter- neither the docking station or the USB adapter are GB, anyone have experience with 3rd party USB Ethernet adapter? the lack of future proofing w/o 802.11ac is pretty annoying. I'm also looking at the HP Spectre x2 as an alternatives. Any of you wish you've gone to other devices? I plan on testing this device out and eventually provide them to a few users as a desktop replacement. So they can be mobile and dock it in the office.