What you need to understand is that "entry level price" or "mid price" or "mid plus" does not equal performance, and do not define what bowlers should use what ball. The ball you choose should be the ball you need, plain and simple, and factors like "oh, but it's not $225 at my pro shop" should not, under any means, enter into the equation.
By no means are the Creature or Orbit Extreme not going to perform with the best balls on the market for the conditions you want them for. The Creature is a perfect choice for when you need length + control, and the Orbit Extreme would just be a slight step down in terms of aggressiveness.
"Do I really need a beginner ball after three years of bowling?" -- let me assure you, again, that what you need is what you need. Why not enjoy the fact that you won't be throwing away your hard-earned cash for a ball that will simply be too aggressive? If what you are saying was true, there would be no reason that folks like Bo and I would be throwing the Creature, the Orbit Extreme, the new Black Angle urethane, etc...it simply wouldn't make sense for us "experienced" bowlers to do so. But we do throw those balls (and I can also assure you, we have more than three years experience doing so), because they give us the look on the lanes we need. Plain and simple, there is no reason to bash a ball, or not have one, because "it seems to cost a little less than the other balls."
If you want to play the second arrow, and get the length necessary to do so on the condition you described, you need a less aggressive ball. That ball is either a Creature or Orbit Extreme.