No other truck or truck-based SUV will ride as well as the RAM. The 'enthusiasts' poo-poo'd the coil rear suspension when it was launched as too soft to tow and do 'real truck stuff'. They have since been proven incredibly wrong. The coils vs leaf rear makes so much difference, it's a truly car like ride even when empty. It rides at least as well as a luxury cars did 15 years ago, and the cabin is *quiet*. Very little wind noise if you don't have tow mirrors, even at 80mph+
Mine has been very reliable, although that's not universal of course. The 8 speed transmission (mine was one of the last years for the 6) has been very reliable. The V6 is dead nuts reliable and the hemi is pretty solid *if you follow the lubrication schedule*. This is not a motor for 3rd world maintenance routines or experimenting with just-as-good-as oils unless you want to buy a ticket for the 'will it eat a cam shaft' lottery.
Mine is an "Express", which has the 5.7 hemi and 3.92 gears. Power is not a concern. There is no gear hunting, etc. Some people complain about the 8 speed hunting on hills with a heavier trailer, though.
If you plan to keep it 10y+ I would opt for no air suspension. That's a time bomb as I mentioned earlier. It's an expensive way to get a few inches of ground clearance.