I have an OME lift (about 2.5 front, and 3 in rear, it now sits level) I have 265/75/16 and I think it looks great!
It is my understanding that if you go with a 285/75/16 you will need at least a one inch body lift as well or you will rub. I believe sn0wrunner has this set up (but with a 2 inch body lift)
It definitely won't look bad. Do the lift and decide on new tires later. I think when my 265's wear out I will get the body lift and 285's like sn0wrunners, but this is only because my rig recently graduated to being a weekend mountain machine only (no daily driving), not because the tires look "small".
GO FOR IT, and post up pics when your done!!