I checked out the website and I can see the one where they replaced the door handle pretty clearly. I would hope that they used their best angle to do this for their ad copy... which leads me to believe that in person, the handle replacement options would stand out pretty sharply and just look cheesy.

However, if you have a good body shop remove the handles and fill appropriately and do what you suggested with the windows... that might be cool looking. Maybe one of the Photoshop wizards who are members could work up what this would look like on our car?

Good luck and definitely post some pics if you decide to do it!