thanks for the reply's everyone, i think for my peace of mind i will go OME i got quoted 2" springs and shocks $1570 installed +$350 for new bump stops and spring seats does this sound reasonable ?

2nd question how does self installed effect warranty? not been that mechanical at all but have a few brain cells floating about do yous think i should do it or get it done by the pros

thanks for all your help everyone
cheers brent