My dealer just located a 2008 Acadia for me. It is an SLT-2 in White Diamond Tricoat with Ebony interior. It has all of the bells and whistles, NAV, DVD, etc BUT it does not have heads up display. Is this feature worth ordering another one, or should I just take the one they found me? In other words, is Heads Up Display worth it? Just a question for all of you owners out there. Thanks.