Just to clear something up, the stock wheels are 15 X 5.5J, not 6J.

The stock tyre size is 195/60/15, which is already quite a wide tyre for a 5.5J wheel (most 195 tyres are reccomended for a 6J wheel, with 5.5J as the minimum allowable width).

205 is definitely too wide for a 5.5J wheel. With a tyre width too wide for the wheel width, the sidewalls become less stable and steering response and handling suffer...