If you are set on Avengers, the LE is the only way to go in my opinion. Given the price difference between Pro, Prem and LE, the LE is the best value and the best looking. I personally like the Blue LE. I think it looks the best. Hulk definitely looks good as well.

Besides the bling, the LE and Prem have one feature missing from the Pro and it's important.

On the LE, you get the Hawkeye ramp and that improves the game play immensely. It lines up shots for you depending on what shots are lit. So it will either feed the left or right flipper. This is completely missing from the Pro. I really think it improves the game.

That said, I had an LE and I've sold it. I still think it's a fun game and you won't lose money. You can buy one at the discounted price they are selling for, enjoy it, and sell it down the road.