2wd or 4wd? 'Easiest' kit is a 2"/4" kit without having to cut anything without sacrificing any ride quality. You can go 3"/5" or 4"/6" but you'll be smacking the frame on bumps and at 4/6 you'd want to look at notching the frame to give you some rear suspension travel. You shouldn't have any vibration issues if you get an alignment done after the install.