The bubble wands are sufficient in circulating the water during the cycle, but you will want to get poweheads asap as it will help the cycle. Once you get inverts or fish, you NEED powerheads. Fish need around 10x circulation and inverts need about 20-25x circulation.
You will probably want to get rid of the bubble wands once you start puting critters in the tank. It will raise the ph too much and the bubbles might even irritate some inverts.