I had 3A's but never did the upgrade before selling them :(
I agree with Tap3sap - it depends a LOT on which amp you have, in terms of power. It also depends a lot on your room size. In a mid to small room, the Vandy's don't need much power. But in a larger room, say 30' on one side, I think you need a rather beefy amp to get a full bodied and controlled sound out of the Vandy's. If you are bass-freak, you can never have enough power :)
I agree with Tap3sap - it depends a LOT on which amp you have, in terms of power. It also depends a lot on your room size. In a mid to small room, the Vandy's don't need much power. But in a larger room, say 30' on one side, I think you need a rather beefy amp to get a full bodied and controlled sound out of the Vandy's. If you are bass-freak, you can never have enough power :)