The beads are a joke, IMO. At least one of the tire manufacturers will not honor the tire warranty if you use them.

Regular weights are the way to go. It's also best to balance the wheel w/o a tire on it, then mark those weights somehow so that when the trackside vendor knows not to strip them off. This helps in two ways - one, it saves your vendor time and materials, and two, it tells you exactly how far out of balance the TIRE is. If it takes too much weight to balance it could be an indicator of a manufacturing flaw.