bro, try to stick with the stock dia as far as u can... cz no matter what, larger dias do matter to some extent. our paki civic's abs, ebd, power steering, speedo etc all are caliberated with 15 inches.
ur abs performance WILL decrease to a considerable extent by moving to a larger rim size.
however, if u do want to change it to 16 inches, then try not to go beyond 2% difference which u can calculate via online tire size calculators as another bro has already mentioned.
if u plan to stick wd 15", go for the genuine oriel style rims as they look better than any other design on this car...
also install electrical door mirrors wd turn sinals. they'll surely make ur ride look "(H)"