Stock WRX wheels for that MY range are 16x6.5. There are plenty of charts out there on width of wheel versus width of tire, but I think on 16x6.5 anywhere between 195 and 215 depending on sidewall height.
Here is a more indepth chart from Yokohama
http://www.yokohamatire.com/utrimwidth.asp
And I would also disagree about the middle picture being too much tire. I think both the second and third pic look just about right (with the third pic maybe on the small side).