For any Ford advocates,
I drive a 14' Ford XTR Extended cab as a work truck, and there's about 10 of them used as field trucks where I work in in Alberta. I can tell you first hand the problems Fords face even being the last year of the previous gen where there should be next to no bugs. Thing is, being pounded through the mud and dirt roads does it in on the suspensions and shocks, tire balancing, bearings,etc, but when you are having head problems (replaced), "VVT Phaser" issues, idler wheel bearing problems (20k km on a non field based truck), and the odd rough shifting of the transmission, off spec front diff resulting in complete replacement of the front end, and mysterious injector related issues resulting in the truck not being able to start, a transmission switch exposed to the debris of the road that can become jammed up with mud/dirt/snow/ice and you can't shift into gear. I enjoy driving my work truck, but it has it's quirks at 22k km (tranny switch problem)
Bear in mind these are work trucks that do take abuse (not so much on the engine/electrical side), there's a few items listed that shouldn't occur to trucks with less than 50k miles. I gander at both Ram and Ford forums as well, and even though I like Fords, the aluminum and the amount of electronic "everything" they piled into the truck just worries me too much for longevity. Ram by the looks of it has some serious electrical horror stories on brand new trucks with the BCMs requiring entire replacement, and the ecodiesel seems to be teething badly as well (http://www.dieselramforum.com/forum/new-member-introductions/5345-beware-new-eco-diesel.html few threads like this)
My personal 08 Sierra has been a tank that has taken abuse and put on a lot of miles in short time without many issues popping up. It vibrates going down the highway as well, even shaking water bottles, but it really doesn't bother me all too much (mind you the age of the truck).
I hope when I get my truck in roughly a month it doesn't vibrate or have transmission problems. All the ones I test drove including a friends seemed to be trouble free in all these "high problematic" areas except for the (now fixed) Sierra headlights. I am being cautious being a new vehicle because across most brands it does seem like quality control/assurance has gone by the wayside in favour of cost cutting.