Recommendation for GPS/DVD/CD unit?

Im possibly looking for a unit that can do the GPS and play CD's and DVD's in dash. Im not looking for anything too fancy but I dont want it to break after having it for a week either. I have an 07 crew cab XE with the regular double din cd player.

I was thinking about just getting the portable units and mounting it on the truck, but I figured I might as well spend a few more bucks and get one that plays DVD's too. Im not a huge sound person, so I dont need anything too crazy. And as weird as it probably sounds, I really dont mind the sound quality that comes out of my stock unit as it is now. Haha.

I also take the truck onto dirt and washboard roads quite often, so I need it to be pretty durable. Not sure if the ones that flip out are going to be heavy duty enough.... But maybe they are?

Any suggestions, links, prices, and reasons would be great.