i travel a lot on m2. and i mean A LOTTT!!! i have a tiny honda city BUT with proper (not over) sized tire. never had any issues with 'wind'. i mean seriously, only a mehran, alto etc scare me on 120 on m2, even a cultus is just fine. i ve driven my city upto 175kmph without much issue. and i ve driven a new cityupto 190, no issue. the only point being that tires were of proper size, proper quality and properly inflated.
but anyways, civic is atleast twice as stable on motorways. i ve driven constantly at 170 in a 2001 civic without any 'panic' feel. so go get it! and a request to all, please dont even MENTION corolla in this thread!