http://goo.gl/9gzKR

This page of this book on google books does NOT mention using "hai shi" when using "dui" in a sentence.

EG, I would simply say : niu rou jiao zi hen hao chi, dui bu dui?

One rough example, all I want to know is would a Chinese native speaker use your wo shi dui de hai shi line, or not? Until a native chinese speaker can correct and inform us accurately, it is all conjecture imho.

Regards