well, while going for a particular tyre size, the main technical concern is the effect on fuel economy....in my case, my car delivers around 15.5kmpl within city drive and with all time AC, which i beleive is pretty impressive anyway for a 1.3L.
BTW, i wonder why everybody is just talking about dunlop and yokos only, why arent u guys discussing bridgestone here? i have been keeping cars since i was in 9th grade and have tried and tested almost all major brands of tyres available in our market, excluding michelin and pirelli. my best experiance has remained with bridgestones.