My winter wheels are VW OEM 17x7.5 Goals, I was going to run 205/50/17 but decided on 215/50/17 because I wanted more sidewall. Only issue might be no protection of the wheel if you decide to rub a curb. According to the tire specs of the X-Ice3 that I got, the 205/50/17 supports mounting on a max 7.5" width wheel.
Thanks, I had cross posted in this thread (https://www.golfmk7.com/forums/showthread.php?t=55641&page=2) and got some good replies there as well. Your 215/50 recommendation was another one and I am leaning that way now. Narrower than stock, but a bit wider for rim protection.