The windshield is different on HUD cars (unless GM specs them all that way now, as probably 75%+ are 3LT) but a lot of guys on CF have installed HUDs after the fact on C5s w/normal windshields and not had problems, There are occasional complaints of double-images, but that's a problem on the regular ones too.
If it was me I'd get the 3LT in a heartbeat, but it's always easy spending someone else's money.
![Smile](images/smilies/smile.gif)
Best of luck with the new ride!
Great color choice, btw.