Yes, I have run OME and then added a 2" budget boost. OME is really 40mm...or about 1.5", and budget boosts are really 1.75", so let's call the whole thing a 3" lift. You don't need new control arms, although you'll want them at some point I think just from a durability standpoint. You do need an adjustable trackbar...but the big issue is shocks.
When you take a 2" suspension lift and add a budget boost, you have not gained any suspension travel, but you are probably planning larger tires. Your shocks simply get extended 2" by the budget boost, which limits down travel and increases up travel. The tires will stuff to the same point, however. Let me say it again: the tires will stuff to the same point, so those 31's you are probably planning are going to tear up your fenders pretty much as if you had tried to run them on the 2" OME.
So get longer shocks with the OME suspension if you really want to go that way...but I wouldn't. OME is an optimized suspension at a small amount of lift, and once you start messing with it you'd might as well get a 3.5" lift from RE and get way more for your money. You could get the 3" OME lift, but again you are spending a lot of money for that. The point of OME is to optimize the factory suspension, and it does that to perfection. I don't think, however, that OME has any advantage once you want new control arms and need an adjustable trackbar.
You can get Bilstein shocks, which are every bit as good as OME (and maybe better for a taller lift if they have more compression valving than the OME shocks), and run them with a complete RE suspension for less money. Just sell your budget boost for half what you paid for it to the next guy in line.
Nay