I have always been a Ford pickup fan. I REALLY like my Dodge though... I had an '80 F250 4x4 with a 400/auto(gutless Calif smogger motor), and then an '89 F250 4x4 xcab 351/stick. The '89 was a great truck.
Having driven a bunch, I still think Ford has a top notch pickup in the F250 line. I've had a few older ones, and have driven some of the newer ones in diesel. The Ford/PS is a great truck, but Dodge has really upped the ante in the last few years. Used to be, IMHO, the Ford was the better truck, independant of engine type. Now, I would not say that; the playing field is pretty level.
For an ultimate truck, I think a Ford F250 with a Cummins motor would be an awesome combination, IMHO better than the Powerstroke. The Power Stroke is a pretty good engine, the 7.3 or the new one. The Cummins is a better motor, built for industiral use. Look at the pictures of the two engines internal parts side by side.
What really has things going for Ford locally here, is the availability of work trucks right off the lot. GM/Mopar do not have that around here. You can go to multiple Ford dealers in the greater Sacramento area and find F250/350/450 in flat bed, utility bed ect, right off the lot.