I thought about doing just a tilt-up in mine. You can get a full power roof for the extended cabs that goes back into the roof and doesnt stick out when its open. I'm more fond of just a tilt-up.
Overall, I have an issue with someone cutting a hole in my roof. lol
I know there's a couple guys with sunroofs that are really happy with them that I'm sure will chime in. If you decide to do it, throw up some pictures and let us know how it turned out. Maybe you can talk me into one.