I have to strongly disagree with the 'your stock setup won't take you many places that you're really wanting to go'. You have to distinguish between expedition travel and off-roading.
Expedition travel will take you over gravel and washboard, mud and through some water for hours and hours. The stock setup is extremely well suitable for that. Stronger springs are a good thing because chances are he'll be heavily loaded, not because he needs a lift. Some of the best and most well built expedition trucks run 29s or 31s. anything bigger than 33s is actually a disadvantage, as the tires will be hard to replace.
The perfect expedition truck has a well maintained stock engine and strong springs on A/T tires in a size that can be found anywhere, with a well sealed electrical system.
cheers,
Jan