Balance beads, Dyna Beads, BB's or sand will all balance a tire if enough put in. Within reason, you cannot put too much in but you can put in too little. All you need is just a little bit more than the weight of the imbalance.
How much is the imbalance, you ask? Well, with a new bike, it is equal to the stick-on weights the manufacturer put on there. 1.5 oz for Agility wheels should be enough.
The highway groves parallel with the travel? Any bike is gonna squirm regardless of balance. Like Stig said, if the front tire is rock-hard, it will squirm more. Especially on something as light as the Agility.