we dont usually need big flex over here (aus), but more so clearance for bigger tyres which will give more ground clearance. as you probably noticed, there's a lot of mud where we are.
if you ever come over here, have a look at the sierra's going around. a 2" Body lift seems to be a normal thing, and its like "if you dont have one, well, what the hell are you waiting for?"
3 of my mates have sierra's, and all have 2" BL in them. but they also have other mods as well, mainly to combat the rolling fairies.
one of my mates has a sierra, still in the build-up process, but list of mods include: SPOA, 2" BL, RUF with CE, 33" swampers, S3 reduction gears, lock-right rear, welded front, shock hoops up front, in-boarded rear shocks, 2" exhaust with extractors.
should be good when its finished.