It really depends on the industry, insitution or department that you are joining in future. aka Culture of the insitution/department. Some places would prefer to take in freshie from top foreign university but sometimes this may not be true. Its very realistic, if your hiring manager and his team are all graduated locally, do you think they will bother whether you graduate from local or foreign uni?? Only certain big name insitution would spefically require its applicants to gradute from top ranked uni, most mnc dont.