It's one of those 6 of one, half a dozen of the others questions.
For 2 inches it's fairly starightforward to replace the springs and dampers but I would advise that if you find it unweildy or harder to drive then the castor arms front and rear plus the Cardan prop will double your total bill.
Add in longer brake hoses and a few other bits and it can be the think end of a grand. That said you will have replaced lots of bits that would need doing eventually and end up with a nicely sorted truck.
Body lift, lots of buzz about this at the moment, it seems popular after a 2" suspension lift as more extrmee lifts do bring mechanical problems. It won't give more belly clearance and does cause conversion nightmares but on the plus side it keep the C of G nearer the floor. Relatively cheap if you can get the spacers machined locally, you will probably find some body repairs that need doing during the lift though so expect it to take a few days not hours.
I prfer the look of a suspension lift, but if I were starting form scratch I honestly don't know which way I'd jump.