We had a really bad experience with Yokohama A39's a couple of years ago. All 4 tires developed bubbles on the sidewalls.
I have had Singa Radial on my car (195/60/15) since December 2007 and done 50 K Kms. I bought those for 3900/peice and they did quite well. Explore those as well.
Yokohama decibels will be found in the range of 6800-7200 per tire. Pretty expensive I must say.