well any lift will make existing vibes worse, unless the part that is causing the vibe is a part replaced with the lift, which is like a 1% chance with a suspension lift, but with a BB impossible because your not replacing anything. generally any lift will make a vibe worse. I do not suggest a BB, but if you get shocks as well I guess the spacers are alright. i would suggest a small suspension lift. you can get the zone 3 inch which is a basic suspension lift, for around 450 to your door.
can you refresh me, whats your budget, and end goal. you were kind of general before so i gave it my best