I wouldnt bother with the body lift, unless running huge tyres (37+)
I would recommend fitting drop boxes if going 4-5 inch lift, much cheaper than new radius arms and often give a better ride.
For 4" you will need
coils
shocks
castor correction (drop boxes or radius arms)
panhards front and rear
adjustable draglink (centres steering wheel)
extended sway bar links (if you are running them, im only running rear)
may as well get a new steering damper while you are doing it
zordos do good kits
http://www.zordos4wdsuspension.com.a...d=49&Itemid=53