My local repair shop favours Asus and Toshiba for ease of repair.
I would try to get the supplier to install Windows 7 before delivery; I have heard of "free" updates costing varying amounts in admin fees. I would have thought most suppliers are ready wit W7 by now and am thinking of buying my wife a laptop like the one you are buying and do not want to confuse the issue with Vista. (I still have XP on my desktop and am migrating to W7 via a dual boot system XP/W7)
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version