Hmm some updates:
Drove the car with these new shoes for around 75kms today! Believe me; these are simply awesom!
There is more confidence while driving on high speeds and overtaking; cornering; breaking.(may be because of wider tyres: 165 to 185)
Well regarding the noise; I feel the noise is good now. Till the speed of 60, the noice is low but above 80 the noise increases comparitively. All because these are sporty tyres. The noice is more on cement road. But any how loved the changed in my car.
Breaking has improved. Cant say its really because of GIIIs; since the section is also increased.
Cornering and overtaking on highspeed is comparitively good, confident and stable now.
Stearing is slight heavy; I feel!
In short; I am happy with these tyres. Since I am happy; Dad is happy too!! No more shakey drives and wobbling!!