Are you looking for winter tires? If so, go with narrower tires not larger (185 instead of 195). Believe it or not, you get more traction with a narrower tire.
Would the 205/60R15 fit? Yes. I have 215/45R17s so the 205 would fit but what's the width of the wheel? 15X? 6"? or 6,5"? The larger tire will look wierd if fitted on a narrow wheel. My 17"s are 7" wide while my 15"s were 6.5" wide so going from 195 to 215 was no problem. Actually, 225s would've looked better on my 17" Viggen wheels but I was worried about rubbing.